|
Hi. I'm a new member finding my way. I bought a lot of Tektronix scopes for the services when with Defence during Vietnam era and visited Tektonix at North Ryde (NSW)
to see about repairs to (I think it's a 564) I still have....still not working I guess after having a new very high voltage insulated transformer wound for CRT filament...two actually, the other must be around "somewhere". I developed a healthy fear of Tektronic CRO's owing to the prices Tektronix charged for repairs..
I have a 425 Mil with broken switch.in Vertical section It's unrepairable. Whilst I could sooner or later find a parts CRO, sight unseen on eBay for example, it may also be on the way out. I think the plastic used in Tektronix may be the lowest quality amongst high quality devices , or maybe they just specify 'shall be or a type formula and manufacture which will maintain all utility until the end of time'
I was directed to your group (Hi...there) . To get to the essential point Would some person have a reasonably low mileage vertical module, complete, which I could buy? Please advise me if so....Australia would be best of course but 'anywhere'. Also...to undo some confusion...I've been told 425 and 465 are "intrinsically" the same CRO...obviously without the Mil labelling... . Does that mean parts are interchangeable?
One reason I ask is that I was also told that the 425 being Military contract and Mil Spec was built to be readily pulled down for field repairs. Is that true?...Is that a quality the 465 does not replicate? if so it may mean that ...just as an example...the vertical amp module from a 465 may have some mounting differences from the 425.
On the other hand it may not. Perhaps someone familiar with this type will bring me to a state of awareness even wisdom regarding my CRO. ...oh... other than having one channel down it seems to work ok and 'oh' again...when I originally pulled it down a piece of curved springy metal fell out. Whence it exactly originated I have no idea...'somewhere inside'. .It may be a method of maintaining the case at frame potential, under pressure as one reassembles the CRO...so perhaps it 'jammed' between a plate on the chassis and the bottom cover. It could have come from elsewhere or it might not be from the CRO at all.....That said, Im pretty sure I saw an exploded view one time where this curved metal piece as shown hanging in mid-air underneath the chassis. Have I been able to find that particular exploded view again (that was 3 years ago)...of course not!!
Any passing of knowledge wisdom common sense mindfulness and most of all perhaps a complete vertical amplifier will be very well received.
--
Jack
|
On Tue, Oct 30, 2018 at 02:52 PM, Jack wrote: Sorry ...the keyboard made an error.....they do that quite often to me and threats and invective directed to it do not improve their performance!!! My keyboard left the words "DiD NOT" out of the following comment: it may also be on the way out. I think the plastic used in Tektronix may be
the lowest quality amongst high quality devices , or maybe they just DID NOTspecify
'shall be or a type formula and manufacture which will maintain all utility
until the end of time'
-- Jack
|
Hello Jack,
What you refer to as 425 Mil is, for correctness sake, a 465M or an AN/USM 425.
It confused me at first, as I didn't recall there was ever a 425 oscilloscope.
For what I know, the 465M is electronically similar to the civilian 465 (but even at electronic diagram level, there ARE differences), but, for the sake of assemblies or sub-assemblies, they're essentially two completely different oscilloscopes (i.e the boards are physically different).
As mentioned on this () page of the TekWiki website, the 465M is more similar to the civilian 455, than it is to the 465.
I can't really tell by how much they are similar, but you may be able to compare them by yourself by looking at the service manuals of both, which are available on the TekWiki website.
The page for the civilian 455 is here:
I don't know much of either (455 or 465M) but, coincidentally, there's a seller on a Brazilian auction site, selling the modules of a Tektronix 455:
I can't tell how similar those modules are (to your 465M) and if they can serve as parts donors, but if you find out that they may help, you can try to contact the seller, or I can help you with the purchase and shipping of the module (or the parts) to your location, for their advertised cost and shipping expenses to your place.
Note: I have no affiliation with the seller (and don't even know if I know them, since the auction site only reveals the seller after you purchase the item).
I normally wouldn't even make this offer, as shipping from Brazil is usually prohibitive and the parts are not even mine... But since you're so far away down under, I think that shipping from anywhere will be just as difficult.
Please let me know if you want my help, or maybe some other folks in the group will chime.
Krgrds,
Fabio
toggle quoted message
Show quoted text
On Tue, Oct 30, 2018 at 06:52 PM, Jack wrote:
Hi. I'm a new member finding my way. I bought a lot of Tektronix scopes for
the services when with Defence during Vietnam era and visited Tektonix at
North Ryde (NSW)
to see about repairs to (I think it's a 564) I still have....still not working
I guess after having a new very high voltage insulated transformer wound for
CRT filament...two actually, the other must be around "somewhere". I
developed a healthy fear of Tektronic CRO's owing to the prices Tektronix
charged for repairs..
I have a 425 Mil with broken switch.in Vertical section It's unrepairable.
Whilst I could sooner or later find a parts CRO, sight unseen on eBay for
example, it may also be on the way out. I think the plastic used in Tektronix
may be the lowest quality amongst high quality devices , or maybe they just
specify 'shall be or a type formula and manufacture which will maintain all
utility until the end of time'
I was directed to your group (Hi...there) . To get to the essential point
Would some person have a reasonably low mileage vertical module, complete,
which I could buy? Please advise me if so....Australia would be best of course
but 'anywhere'. Also...to undo some confusion...I've been told 425 and 465 are
"intrinsically" the same CRO...obviously without the Mil labelling... . Does
that mean parts are interchangeable?
One reason I ask is that I was also told that the 425 being Military contract
and Mil Spec was built to be readily pulled down for field repairs. Is that
true?...Is that a quality the 465 does not replicate? if so it may mean that
...just as an example...the vertical amp module from a 465 may have some
mounting differences from the 425.
On the other hand it may not. Perhaps someone familiar with this type will
bring me to a state of awareness even wisdom regarding my CRO. ...oh... other
than having one channel down it seems to work ok and 'oh' again...when I
originally pulled it down a piece of curved springy metal fell out. Whence it
exactly originated I have no idea...'somewhere inside'. .It may be a method
of maintaining the case at frame potential, under pressure as one reassembles
the CRO...so perhaps it 'jammed' between a plate on the chassis and the
bottom cover. It could have come from elsewhere or it might not be from the
CRO at all.....That said, Im pretty sure I saw an exploded view one time where
this curved metal piece as shown hanging in mid-air underneath the chassis.
Have I been able to find that particular exploded view again (that was 3 years
ago)...of course not!!
Any passing of knowledge wisdom common sense mindfulness and most of all
perhaps a complete vertical amplifier will be very well received.
--
Jack
|
Hello jack
465M is the commercial version of AN-USM425V
AN-USM 425V is the military version of 465M
Both are fully compatible with each other and share the same parts and Modules
465M and 465 are not similar, not even by 5% except maybe the bandwidth
465 was manufactured long before 465M was made available (Early 1980 ) 465M has a modular design to facilitate field service, that is vertical and Horizontal modules can be replaced in minutes while 465 has separate boards for each stage
Also reading the reply above I have to state that 465M and 455 a2/b2 are NOT compatible, 455M has a lower bandwidth and although it is of modular design and similar shape modules are not the same, even knobs are different, unfortunately I do not have any vertical modules for either scopes at this time
Dinos
|
On 10/31/2018 11:56 AM, Fabio Trevisan wrote: Hello Jack,
What you refer to as 425 Mil is, for correctness sake, a 465M or an AN/USM 425.
It confused me at first, as I didn't recall there was ever a 425 oscilloscope.
For what I know, the 465M is electronically similar to the civilian 465 (but even at electronic diagram level, there ARE differences), but, for the sake of assemblies or sub-assemblies, they're essentially two completely different oscilloscopes (i.e the boards are physically different).
As mentioned on this () page of the TekWiki website, the 465M is more similar to the civilian 455, than it is to the 465.
I can't really tell by how much they are similar, but you may be able to compare them by yourself by looking at the service manuals of both, which are available on the TekWiki website.
The page for the civilian 455 is here:
I don't know much of either (455 or 465M) but, coincidentally, there's a seller on a Brazilian auction site, selling the modules of a Tektronix 455:
I can't tell how similar those modules are (to your 465M) and if they can serve as parts donors, but if you find out that they may help, you can try to contact the seller, or I can help you with the purchase and shipping of the module (or the parts) to your location, for their advertised cost and shipping expenses to your place.
Note: I have no affiliation with the seller (and don't even know if I know them, since the auction site only reveals the seller after you purchase the item).
I normally wouldn't even make this offer, as shipping from Brazil is usually prohibitive and the parts are not even mine... But since you're so far away down under, I think that shipping from anywhere will be just as difficult.
Please let me know if you want my help, or maybe some other folks in the group will chime.
Krgrds,
Fabio
On Tue, Oct 30, 2018 at 06:52 PM, Jack wrote:
Hi. I'm a new member finding my way. I bought a lot of Tektronix scopes for
the services when with Defence during Vietnam era and visited Tektonix at
North Ryde (NSW)
to see about repairs to (I think it's a 564) I still have....still not working
I guess after having a new very high voltage insulated transformer wound for
CRT filament...two actually, the other must be around "somewhere". I
developed a healthy fear of Tektronic CRO's owing to the prices Tektronix
charged for repairs..
I have a 425 Mil with broken switch.in Vertical section It's unrepairable.
Whilst I could sooner or later find a parts CRO, sight unseen on eBay for
example, it may also be on the way out. I think the plastic used in Tektronix
may be the lowest quality amongst high quality devices , or maybe they just
specify 'shall be or a type formula and manufacture which will maintain all
utility until the end of time'
I was directed to your group (Hi...there) . To get to the essential point
Would some person have a reasonably low mileage vertical module, complete,
which I could buy? Please advise me if so....Australia would be best of course
but 'anywhere'. Also...to undo some confusion...I've been told 425 and 465 are
"intrinsically" the same CRO...obviously without the Mil labelling... . Does
that mean parts are interchangeable?
One reason I ask is that I was also told that the 425 being Military contract
and Mil Spec was built to be readily pulled down for field repairs. Is that
true?...Is that a quality the 465 does not replicate? if so it may mean that
...just as an example...the vertical amp module from a 465 may have some
mounting differences from the 425.
On the other hand it may not. Perhaps someone familiar with this type will
bring me to a state of awareness even wisdom regarding my CRO. ...oh... other
than having one channel down it seems to work ok and 'oh' again...when I
originally pulled it down a piece of curved springy metal fell out. Whence it
exactly originated I have no idea...'somewhere inside'. .It may be a method
of maintaining the case at frame potential, under pressure as one reassembles
the CRO...so perhaps it 'jammed' between a plate on the chassis and the
bottom cover. It could have come from elsewhere or it might not be from the
CRO at all.....That said, Im pretty sure I saw an exploded view one time where
this curved metal piece as shown hanging in mid-air underneath the chassis.
Have I been able to find that particular exploded view again (that was 3 years
ago)...of course not!!
Any passing of knowledge wisdom common sense mindfulness and most of all
perhaps a complete vertical amplifier will be very well received.
--
Jack
I have a 465M vertical module I bought as a backup. NOS but not tested within the last five years or more. Thanks, ? Bert
|
Thanks Fabio...I'll note all that and look at the URL's....It will help me gain knowledge I am much appreciative and will follow your leads. I think you
are pretty much on the ball in what you are telling me as it supports what I am slowly learning...
I hear rumours that the 465 Military was also nominated as 425 Military. The same rumour included that they were built to be rapidly pulled down
for field service. Dinos of qservices, advised me "So 465M and 425 are exactly the same oscilloscopes, sometimes the badge on the front may say
465M or AN-USM 425 ........there is no other connection or similarity with models 465 465B 475 or 475A"
Completely away from that....I bought hundreds of Tektronix scopes for the Australian services during Vietnam. In my view the BWD was a better
scope, better specs,a lot cheaper, easier to service, lightweight and Australian made. I refused for months to agree to the Tektronix and the outcome
is an interesting story which I still cannot repeat.
My BWD still works perfectly (or seems to!) and has never had a repair. The reality is that the extremes of technical possibility with (say) Tektronix is
I say from imagination ...used rarely, it's essentially lab equipment and portable if you own an elephant. I recall carting one when with IBM...
We were expected to walk many blocks carrying quite a heavy tool load and sometimes that included the CRO...bus fares were not reimbursed. I
suppose it's like owning a Lambo or something of that type.......it's a real buzz, expensive, expensive to service but you rarely use more than
5-10% of its possibilities.
I bought the 425 because I have always lusted after a Tektronix...and I guess some military prejudice with the 425M.....It was faulty in the ChA vertical....I
ought to have realised it wouldn't be a simple repair...well it would be in Echelons...pull the vertical out...5-10 minutes, install another, U/S the faulty one
and send it away for component level repair, the unit now back in business. Where are all those scopes and spares now?
I can only say "deo gratias" for the site and the helpful people in it....Ciao Fabian
toggle quoted message
Show quoted text
-----Original Message----- From: Fabio Trevisan Sent: Thursday, November 1, 2018 1:56 AM To: [email protected]Subject: Re: [TekScopes] 425 Mil vertical module needed....seeking Hello Jack, What you refer to as 425 Mil is, for correctness sake, a 465M or an AN/USM 425. It confused me at first, as I didn't recall there was ever a 425 oscilloscope. For what I know, the 465M is electronically similar to the civilian 465 (but even at electronic diagram level, there ARE differences), but, for the sake of assemblies or sub-assemblies, they're essentially two completely different oscilloscopes (i.e the boards are physically different). As mentioned on this () page of the TekWiki website, the 465M is more similar to the civilian 455, than it is to the 465. I can't really tell by how much they are similar, but you may be able to compare them by yourself by looking at the service manuals of both, which are available on the TekWiki website. The page for the civilian 455 is here: I don't know much of either (455 or 465M) but, coincidentally, there's a seller on a Brazilian auction site, selling the modules of a Tektronix 455: I can't tell how similar those modules are (to your 465M) and if they can serve as parts donors, but if you find out that they may help, you can try to contact the seller, or I can help you with the purchase and shipping of the module (or the parts) to your location, for their advertised cost and shipping expenses to your place. Note: I have no affiliation with the seller (and don't even know if I know them, since the auction site only reveals the seller after you purchase the item). I normally wouldn't even make this offer, as shipping from Brazil is usually prohibitive and the parts are not even mine... But since you're so far away down under, I think that shipping from anywhere will be just as difficult. Please let me know if you want my help, or maybe some other folks in the group will chime. Krgrds, Fabio On Tue, Oct 30, 2018 at 06:52 PM, Jack wrote:
Hi. I'm a new member finding my way. I bought a lot of Tektronix scopes for
the services when with Defence during Vietnam era and visited Tektonix at
North Ryde (NSW)
to see about repairs to (I think it's a 564) I still have....still not working
I guess after having a new very high voltage insulated transformer wound for
CRT filament...two actually, the other must be around "somewhere". I
developed a healthy fear of Tektronic CRO's owing to the prices Tektronix
charged for repairs..
I have a 425 Mil with broken switch.in Vertical section It's unrepairable.
Whilst I could sooner or later find a parts CRO, sight unseen on eBay for
example, it may also be on the way out. I think the plastic used in Tektronix
may be the lowest quality amongst high quality devices , or maybe they just
specify 'shall be or a type formula and manufacture which will maintain all
utility until the end of time'
I was directed to your group (Hi...there) . To get to the essential point
Would some person have a reasonably low mileage vertical module, complete,
which I could buy? Please advise me if so....Australia would be best of course
but 'anywhere'. Also...to undo some confusion...I've been told 425 and 465 are
"intrinsically" the same CRO...obviously without the Mil labelling... . Does
that mean parts are interchangeable?
One reason I ask is that I was also told that the 425 being Military contract
and Mil Spec was built to be readily pulled down for field repairs. Is that
true?...Is that a quality the 465 does not replicate? if so it may mean that
...just as an example...the vertical amp module from a 465 may have some
mounting differences from the 425.
On the other hand it may not. Perhaps someone familiar with this type will
bring me to a state of awareness even wisdom regarding my CRO. ...oh... other
than having one channel down it seems to work ok and 'oh' again...when I
originally pulled it down a piece of curved springy metal fell out. Whence it
exactly originated I have no idea...'somewhere inside'. .It may be a method
of maintaining the case at frame potential, under pressure as one reassembles
the CRO...so perhaps it 'jammed' between a plate on the chassis and the
bottom cover. It could have come from elsewhere or it might not be from the
CRO at all.....That said, Im pretty sure I saw an exploded view one time where
this curved metal piece as shown hanging in mid-air underneath the chassis.
Have I been able to find that particular exploded view again (that was 3 years
ago)...of course not!!
Any passing of knowledge wisdom common sense mindfulness and most of all
perhaps a complete vertical amplifier will be very well received.
--
Jack
-- Jack
|
Hi...and thanks for the offer towards the end of your letter Fabio...I sent in what I presume to be the correct 'slot', {Ou pergunte ao vendedor...Escreva uma pergunta... }
this as follows:
Hi I need a vertical Amplifier (complete module) for a Tektronix M 425....do you have a low mileage; unit? My Regards Tony,..... goldmort@onthenet,com.au.
Hola, necesito un amplificador vertical (m¨®dulo completo) para un Tektronix M 425 ... ?tiene poco kilometraje? ?unidad? Mis saludos Tony, goldmort @ onthenet, com.au
Oi eu preciso de um amplificador vertical (m¨®dulo completo) para um Tektronix M 425 .... voc¨º tem uma baixa quilometragem; unidade? Meus cumprimentos
Tony, goldmort @ onthenet, com.au
Hopefully the Google translations do not see him lying on the ground laughing and crying at the same time!!
Warm Regards Fabio
Jack
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Show quoted text
-----Original Message----- From: Bert Haskins Sent: Thursday, November 1, 2018 6:30 AM To: [email protected]Subject: Re: [TekScopes] 425 Mil vertical module needed....seeking On 10/31/2018 11:56 AM, Fabio Trevisan wrote: Hello Jack,
What you refer to as 425 Mil is, for correctness sake, a 465M or an AN/USM 425.
It confused me at first, as I didn't recall there was ever a 425 oscilloscope.
For what I know, the 465M is electronically similar to the civilian 465 (but even at electronic diagram level, there ARE differences), but, for the sake of assemblies or sub-assemblies, they're essentially two completely different oscilloscopes (i.e the boards are physically different).
As mentioned on this () page of the TekWiki website, the 465M is more similar to the civilian 455, than it is to the 465.
I can't really tell by how much they are similar, but you may be able to compare them by yourself by looking at the service manuals of both, which are available on the TekWiki website.
The page for the civilian 455 is here:
I don't know much of either (455 or 465M) but, coincidentally, there's a seller on a Brazilian auction site, selling the modules of a Tektronix 455:
I can't tell how similar those modules are (to your 465M) and if they can serve as parts donors, but if you find out that they may help, you can try to contact the seller, or I can help you with the purchase and shipping of the module (or the parts) to your location, for their advertised cost and shipping expenses to your place.
Note: I have no affiliation with the seller (and don't even know if I know them, since the auction site only reveals the seller after you purchase the item).
I normally wouldn't even make this offer, as shipping from Brazil is usually prohibitive and the parts are not even mine... But since you're so far away down under, I think that shipping from anywhere will be just as difficult.
Please let me know if you want my help, or maybe some other folks in the group will chime.
Krgrds,
Fabio
On Tue, Oct 30, 2018 at 06:52 PM, Jack wrote:
Hi. I'm a new member finding my way. I bought a lot of Tektronix scopes for
the services when with Defence during Vietnam era and visited Tektonix at
North Ryde (NSW)
to see about repairs to (I think it's a 564) I still have....still not working
I guess after having a new very high voltage insulated transformer wound for
CRT filament...two actually, the other must be around "somewhere". I
developed a healthy fear of Tektronic CRO's owing to the prices Tektronix
charged for repairs..
I have a 425 Mil with broken switch.in Vertical section It's unrepairable.
Whilst I could sooner or later find a parts CRO, sight unseen on eBay for
example, it may also be on the way out. I think the plastic used in Tektronix
may be the lowest quality amongst high quality devices , or maybe they just
specify 'shall be or a type formula and manufacture which will maintain all
utility until the end of time'
I was directed to your group (Hi...there) . To get to the essential point
Would some person have a reasonably low mileage vertical module, complete,
which I could buy? Please advise me if so....Australia would be best of course
but 'anywhere'. Also...to undo some confusion...I've been told 425 and 465 are
"intrinsically" the same CRO...obviously without the Mil labelling... . Does
that mean parts are interchangeable?
One reason I ask is that I was also told that the 425 being Military contract
and Mil Spec was built to be readily pulled down for field repairs. Is that
true?...Is that a quality the 465 does not replicate? if so it may mean that
...just as an example...the vertical amp module from a 465 may have some
mounting differences from the 425.
On the other hand it may not. Perhaps someone familiar with this type will
bring me to a state of awareness even wisdom regarding my CRO. ...oh... other
than having one channel down it seems to work ok and 'oh' again...when I
originally pulled it down a piece of curved springy metal fell out. Whence it
exactly originated I have no idea...'somewhere inside'. .It may be a method
of maintaining the case at frame potential, under pressure as one reassembles
the CRO...so perhaps it 'jammed' between a plate on the chassis and the
bottom cover. It could have come from elsewhere or it might not be from the
CRO at all.....That said, Im pretty sure I saw an exploded view one time where
this curved metal piece as shown hanging in mid-air underneath the chassis.
Have I been able to find that particular exploded view again (that was 3 years
ago)...of course not!!
Any passing of knowledge wisdom common sense mindfulness and most of all
perhaps a complete vertical amplifier will be very well received.
--
Jack
I have a 465M vertical module I bought as a backup. NOS but not tested within the last five years or more. Thanks, Bert
-- Jack
|
On Wed, 31 Oct 2018 08:56:47 -0700, you wrote: Many of the functions of a Mil qualified piece of test equipment (or flightline, I'm extrapolating from that) are as follows: 1) mil qualified parts (for TTL, for instance, expanded temperature range and +/- 0.5 volt tolerance on VCC rather than 0.25 volts) 2) vibration and temperature tolerances 3) (perhaps most important): the ability to repair a unit by (on the flightline) by replacing an whole unit, for instance, a complete power supply, or a vertical channel, or a CRT/display unit, that kind of thing. This is, I suspect, where the (apparently) massive difference in physical construction might come from. Diagnostics wise, you'd go out to the aircraft, diagnose the radar, and find out what is malfunctioning (transmitter, receiver, processor, etc). You'd black box replace the entire unit. That unit would go back to the depot. At the depot, special test equipment (bought from the radar's manufacturer) would diagnose the failing unit to a particular board. That board would be replaced and the unit would be re-tested. The failing board would go back to the manufacturer for testing and repair. Sound familiar? I'm suspecting that the physical construction of this scope allowed this kind of repair. Not sure, though. Harvey Hello Jack,
What you refer to as 425 Mil is, for correctness sake, a 465M or an AN/USM 425.
It confused me at first, as I didn't recall there was ever a 425 oscilloscope.
For what I know, the 465M is electronically similar to the civilian 465 (but even at electronic diagram level, there ARE differences), but, for the sake of assemblies or sub-assemblies, they're essentially two completely different oscilloscopes (i.e the boards are physically different).
As mentioned on this () page of the TekWiki website, the 465M is more similar to the civilian 455, than it is to the 465.
I can't really tell by how much they are similar, but you may be able to compare them by yourself by looking at the service manuals of both, which are available on the TekWiki website.
The page for the civilian 455 is here:
I don't know much of either (455 or 465M) but, coincidentally, there's a seller on a Brazilian auction site, selling the modules of a Tektronix 455:
I can't tell how similar those modules are (to your 465M) and if they can serve as parts donors, but if you find out that they may help, you can try to contact the seller, or I can help you with the purchase and shipping of the module (or the parts) to your location, for their advertised cost and shipping expenses to your place.
Note: I have no affiliation with the seller (and don't even know if I know them, since the auction site only reveals the seller after you purchase the item).
I normally wouldn't even make this offer, as shipping from Brazil is usually prohibitive and the parts are not even mine... But since you're so far away down under, I think that shipping from anywhere will be just as difficult.
Please let me know if you want my help, or maybe some other folks in the group will chime.
Krgrds,
Fabio
On Tue, Oct 30, 2018 at 06:52 PM, Jack wrote:
Hi. I'm a new member finding my way. I bought a lot of Tektronix scopes for
the services when with Defence during Vietnam era and visited Tektonix at
North Ryde (NSW)
to see about repairs to (I think it's a 564) I still have....still not working
I guess after having a new very high voltage insulated transformer wound for
CRT filament...two actually, the other must be around "somewhere". I
developed a healthy fear of Tektronic CRO's owing to the prices Tektronix
charged for repairs..
I have a 425 Mil with broken switch.in Vertical section It's unrepairable.
Whilst I could sooner or later find a parts CRO, sight unseen on eBay for
example, it may also be on the way out. I think the plastic used in Tektronix
may be the lowest quality amongst high quality devices , or maybe they just
specify 'shall be or a type formula and manufacture which will maintain all
utility until the end of time'
I was directed to your group (Hi...there) . To get to the essential point
Would some person have a reasonably low mileage vertical module, complete,
which I could buy? Please advise me if so....Australia would be best of course
but 'anywhere'. Also...to undo some confusion...I've been told 425 and 465 are
"intrinsically" the same CRO...obviously without the Mil labelling... . Does
that mean parts are interchangeable?
One reason I ask is that I was also told that the 425 being Military contract
and Mil Spec was built to be readily pulled down for field repairs. Is that
true?...Is that a quality the 465 does not replicate? if so it may mean that
...just as an example...the vertical amp module from a 465 may have some
mounting differences from the 425.
On the other hand it may not. Perhaps someone familiar with this type will
bring me to a state of awareness even wisdom regarding my CRO. ...oh... other
than having one channel down it seems to work ok and 'oh' again...when I
originally pulled it down a piece of curved springy metal fell out. Whence it
exactly originated I have no idea...'somewhere inside'. .It may be a method
of maintaining the case at frame potential, under pressure as one reassembles
the CRO...so perhaps it 'jammed' between a plate on the chassis and the
bottom cover. It could have come from elsewhere or it might not be from the
CRO at all.....That said, Im pretty sure I saw an exploded view one time where
this curved metal piece as shown hanging in mid-air underneath the chassis.
Have I been able to find that particular exploded view again (that was 3 years
ago)...of course not!!
Any passing of knowledge wisdom common sense mindfulness and most of all
perhaps a complete vertical amplifier will be very well received.
--
Jack
|
Hi Jack,
The google translations are perfect, both in Portuguese and Spanish. Only the expression "mileage" in Portuguese and in Spanish are not usually used for anything else than vehicles.
For the strict meaning of "usage", we just say "uso" (which is the exact translation of usage).
In view of the answer from Dinos (thanks Dinos for correcting my assumptions), the contact with this seller in Brazil may not yield anything fruitful, as this guy seem to be a lonely wolf (he doesn't seem to have anything else than this 455 parts... and since the parts differ from the AN/USM 425 that you have, those parts probably aren't interchangeable with yours.
But Bert already chimed in that he has a NOS 465M module... so I think you already have a good lead.
About Tektronix, vs anything else... I also have mixed feelings about it... In my first job in the 80s, most of the scopes were Philips and I loved them... and we had one Tek 465 which I was never comfortable to work with.
I found back then that arrangement of the time base knobs clumsy and awkward to use, and that the lack of an ALT delayed time base was really a big weakness... and I still think it was... I really don't know how Tek got away with selling so well the 46x line with that useless "Mix" mode, when they had earlier designs which already had the "ALT" time base.
To some extent, some of that awkwardness in using the Tek scopes have disappeared as I became used to its "User Interface", and I learnt also to appreciate that many of those features that I took for granted on the Philips scopes were actually invented and appeared first on some Tek scope many years before (which I didn't know back then).
Today I own a Tek 7623A with 3 plugins, and a jap scope, a 60MHz triple trace Kenwood scope... And I like both very much. The Kenwood is very powerful for its relatively simple design (there are no double sided PCBs!).
Wish you luck with your 465M
Rgrds,
Fabio
toggle quoted message
Show quoted text
On Wed, Oct 31, 2018 at 06:22 PM, Jack wrote:
Hi...and thanks for the offer towards the end of your letter Fabio...I sent
in what I presume to be the correct 'slot', {Ou pergunte ao
vendedor...Escreva uma pergunta... }
this as follows:
Hi I need a vertical Amplifier (complete module) for a Tektronix M
425....do you have a low mileage; unit? My Regards Tony,.....
goldmort@onthenet,com.au.
Hola, necesito un amplificador vertical (m¨®dulo completo) para un Tektronix
M 425 ... ?tiene poco kilometraje? ?unidad? Mis saludos Tony, goldmort @
onthenet, com.au
Oi eu preciso de um amplificador vertical (m¨®dulo completo) para um
Tektronix M 425 .... voc¨º tem uma baixa quilometragem; unidade? Meus
cumprimentos
Tony, goldmort @ onthenet, com.au
Hopefully the Google translations do not see him lying on the ground
laughing and crying at the same time!!
Warm Regards Fabio
Jack
-----Original Message-----
From: Bert Haskins
Sent: Thursday, November 1, 2018 6:30 AM
To: [email protected]
Subject: Re: [TekScopes] 425 Mil vertical module needed....seeking
On 10/31/2018 11:56 AM, Fabio Trevisan wrote:
Hello Jack,
What you refer to as 425 Mil is, for correctness sake, a 465M or an AN/USM
425.
It confused me at first, as I didn't recall there was ever a 425
oscilloscope.
For what I know, the 465M is electronically similar to the civilian 465
(but even at electronic diagram level, there ARE differences), but, for
the sake of assemblies or sub-assemblies, they're essentially two
completely different oscilloscopes (i.e the boards are physically
different).
As mentioned on this () page of the
TekWiki website, the 465M is more similar to the civilian 455, than it is
to the 465.
I can't really tell by how much they are similar, but you may be able to
compare them by yourself by looking at the service manuals of both, which
are available on the TekWiki website.
The page for the civilian 455 is here:
I don't know much of either (455 or 465M) but, coincidentally, there's a
seller on a Brazilian auction site, selling the modules of a Tektronix
455:
I can't tell how similar those modules are (to your 465M) and if they can
serve as parts donors, but if you find out that they may help, you can try
to contact the seller, or I can help you with the purchase and shipping of
the module (or the parts) to your location, for their advertised cost and
shipping expenses to your place.
Note: I have no affiliation with the seller (and don't even know if I know
them, since the auction site only reveals the seller after you purchase
the item).
I normally wouldn't even make this offer, as shipping from Brazil is
usually prohibitive and the parts are not even mine... But since you're so
far away down under, I think that shipping from anywhere will be just as
difficult.
Please let me know if you want my help, or maybe some other folks in the
group will chime.
Krgrds,
Fabio
On Tue, Oct 30, 2018 at 06:52 PM, Jack wrote:
Hi. I'm a new member finding my way. I bought a lot of Tektronix scopes
for
the services when with Defence during Vietnam era and visited Tektonix at
North Ryde (NSW)
to see about repairs to (I think it's a 564) I still have....still not
working
I guess after having a new very high voltage insulated transformer wound
for
CRT filament...two actually, the other must be around "somewhere". I
developed a healthy fear of Tektronic CRO's owing to the prices Tektronix
charged for repairs..
I have a 425 Mil with broken switch.in Vertical section It's
unrepairable.
Whilst I could sooner or later find a parts CRO, sight unseen on eBay for
example, it may also be on the way out. I think the plastic used in
Tektronix
may be the lowest quality amongst high quality devices , or maybe they
just
specify 'shall be or a type formula and manufacture which will maintain
all
utility until the end of time'
I was directed to your group (Hi...there) . To get to the essential point
Would some person have a reasonably low mileage vertical module,
complete,
which I could buy? Please advise me if so....Australia would be best of
course
but 'anywhere'. Also...to undo some confusion...I've been told 425 and
465 are
"intrinsically" the same CRO...obviously without the Mil labelling... .
Does
that mean parts are interchangeable?
One reason I ask is that I was also told that the 425 being Military
contract
and Mil Spec was built to be readily pulled down for field repairs. Is
that
true?...Is that a quality the 465 does not replicate? if so it may mean
that
...just as an example...the vertical amp module from a 465 may have some
mounting differences from the 425.
On the other hand it may not. Perhaps someone familiar with this type
will
bring me to a state of awareness even wisdom regarding my CRO. ...oh...
other
than having one channel down it seems to work ok and 'oh' again...when I
originally pulled it down a piece of curved springy metal fell out.
Whence it
exactly originated I have no idea...'somewhere inside'. .It may be a
method
of maintaining the case at frame potential, under pressure as one
reassembles
the CRO...so perhaps it 'jammed' between a plate on the chassis and the
bottom cover. It could have come from elsewhere or it might not be from
the
CRO at all.....That said, Im pretty sure I saw an exploded view one time
where
this curved metal piece as shown hanging in mid-air underneath the
chassis.
Have I been able to find that particular exploded view again (that was 3
years
ago)...of course not!!
Any passing of knowledge wisdom common sense mindfulness and most of all
perhaps a complete vertical amplifier will be very well received.
--
Jack
I have a 465M vertical module I bought as a backup.
NOS but not tested within the last five years or more.
Thanks,
Bert
--
Jack
|
Hi..all interesting ...who's Bert?...I haven't seen anything from him.....My regards
toggle quoted message
Show quoted text
-----Original Message----- From: Fabio Trevisan Sent: Thursday, November 1, 2018 10:59 AM To: [email protected]Subject: Re: [TekScopes] 425 Mil vertical module needed....seeking Hi Jack, The google translations are perfect, both in Portuguese and Spanish. Only the expression "mileage" in Portuguese and in Spanish are not usually used for anything else than vehicles. For the strict meaning of "usage", we just say "uso" (which is the exact translation of usage). In view of the answer from Dinos (thanks Dinos for correcting my assumptions), the contact with this seller in Brazil may not yield anything fruitful, as this guy seem to be a lonely wolf (he doesn't seem to have anything else than this 455 parts... and since the parts differ from the AN/USM 425 that you have, those parts probably aren't interchangeable with yours. But Bert already chimed in that he has a NOS 465M module... so I think you already have a good lead. About Tektronix, vs anything else... I also have mixed feelings about it... In my first job in the 80s, most of the scopes were Philips and I loved them... and we had one Tek 465 which I was never comfortable to work with. I found back then that arrangement of the time base knobs clumsy and awkward to use, and that the lack of an ALT delayed time base was really a big weakness... and I still think it was... I really don't know how Tek got away with selling so well the 46x line with that useless "Mix" mode, when they had earlier designs which already had the "ALT" time base. To some extent, some of that awkwardness in using the Tek scopes have disappeared as I became used to its "User Interface", and I learnt also to appreciate that many of those features that I took for granted on the Philips scopes were actually invented and appeared first on some Tek scope many years before (which I didn't know back then). Today I own a Tek 7623A with 3 plugins, and a jap scope, a 60MHz triple trace Kenwood scope... And I like both very much. The Kenwood is very powerful for its relatively simple design (there are no double sided PCBs!). Wish you luck with your 465M Rgrds, Fabio On Wed, Oct 31, 2018 at 06:22 PM, Jack wrote:
Hi...and thanks for the offer towards the end of your letter Fabio...I sent
in what I presume to be the correct 'slot', {Ou pergunte ao
vendedor...Escreva uma pergunta... }
this as follows:
Hi I need a vertical Amplifier (complete module) for a Tektronix M
425....do you have a low mileage; unit? My Regards Tony,.....
goldmort@onthenet,com.au.
Hola, necesito un amplificador vertical (m¨®dulo completo) para un Tektronix
M 425 ... ?tiene poco kilometraje? ?unidad? Mis saludos Tony, goldmort @
onthenet, com.au
Oi eu preciso de um amplificador vertical (m¨®dulo completo) para um
Tektronix M 425 .... voc¨º tem uma baixa quilometragem; unidade? Meus
cumprimentos
Tony, goldmort @ onthenet, com.au
Hopefully the Google translations do not see him lying on the ground
laughing and crying at the same time!!
Warm Regards Fabio
Jack
-----Original Message-----
From: Bert Haskins
Sent: Thursday, November 1, 2018 6:30 AM
To: [email protected]
Subject: Re: [TekScopes] 425 Mil vertical module needed....seeking
On 10/31/2018 11:56 AM, Fabio Trevisan wrote:
Hello Jack,
What you refer to as 425 Mil is, for correctness sake, a 465M or an AN/USM
425.
It confused me at first, as I didn't recall there was ever a 425
oscilloscope.
For what I know, the 465M is electronically similar to the civilian 465
(but even at electronic diagram level, there ARE differences), but, for
the sake of assemblies or sub-assemblies, they're essentially two
completely different oscilloscopes (i.e the boards are physically
different).
As mentioned on this () page of the
TekWiki website, the 465M is more similar to the civilian 455, than it is
to the 465.
I can't really tell by how much they are similar, but you may be able to
compare them by yourself by looking at the service manuals of both, which
are available on the TekWiki website.
The page for the civilian 455 is here:
I don't know much of either (455 or 465M) but, coincidentally, there's a
seller on a Brazilian auction site, selling the modules of a Tektronix
455:
I can't tell how similar those modules are (to your 465M) and if they can
serve as parts donors, but if you find out that they may help, you can try
to contact the seller, or I can help you with the purchase and shipping of
the module (or the parts) to your location, for their advertised cost and
shipping expenses to your place.
Note: I have no affiliation with the seller (and don't even know if I know
them, since the auction site only reveals the seller after you purchase
the item).
I normally wouldn't even make this offer, as shipping from Brazil is
usually prohibitive and the parts are not even mine... But since you're so
far away down under, I think that shipping from anywhere will be just as
difficult.
Please let me know if you want my help, or maybe some other folks in the
group will chime.
Krgrds,
Fabio
On Tue, Oct 30, 2018 at 06:52 PM, Jack wrote:
Hi. I'm a new member finding my way. I bought a lot of Tektronix scopes
for
the services when with Defence during Vietnam era and visited Tektonix at
North Ryde (NSW)
to see about repairs to (I think it's a 564) I still have....still not
working
I guess after having a new very high voltage insulated transformer wound
for
CRT filament...two actually, the other must be around "somewhere". I
developed a healthy fear of Tektronic CRO's owing to the prices Tektronix
charged for repairs..
I have a 425 Mil with broken switch.in Vertical section It's
unrepairable.
Whilst I could sooner or later find a parts CRO, sight unseen on eBay for
example, it may also be on the way out. I think the plastic used in
Tektronix
may be the lowest quality amongst high quality devices , or maybe they
just
specify 'shall be or a type formula and manufacture which will maintain
all
utility until the end of time'
I was directed to your group (Hi...there) . To get to the essential point
Would some person have a reasonably low mileage vertical module,
complete,
which I could buy? Please advise me if so....Australia would be best of
course
but 'anywhere'. Also...to undo some confusion...I've been told 425 and
465 are
"intrinsically" the same CRO...obviously without the Mil labelling... .
Does
that mean parts are interchangeable?
One reason I ask is that I was also told that the 425 being Military
contract
and Mil Spec was built to be readily pulled down for field repairs. Is
that
true?...Is that a quality the 465 does not replicate? if so it may mean
that
...just as an example...the vertical amp module from a 465 may have some
mounting differences from the 425.
On the other hand it may not. Perhaps someone familiar with this type
will
bring me to a state of awareness even wisdom regarding my CRO. ...oh...
other
than having one channel down it seems to work ok and 'oh' again...when I
originally pulled it down a piece of curved springy metal fell out.
Whence it
exactly originated I have no idea...'somewhere inside'. .It may be a
method
of maintaining the case at frame potential, under pressure as one
reassembles
the CRO...so perhaps it 'jammed' between a plate on the chassis and the
bottom cover. It could have come from elsewhere or it might not be from
the
CRO at all.....That said, Im pretty sure I saw an exploded view one time
where
this curved metal piece as shown hanging in mid-air underneath the
chassis.
Have I been able to find that particular exploded view again (that was 3
years
ago)...of course not!!
Any passing of knowledge wisdom common sense mindfulness and most of all
perhaps a complete vertical amplifier will be very well received.
--
Jack
I have a 465M vertical module I bought as a backup.
NOS but not tested within the last five years or more.
Thanks,
Bert
--
Jack
-- Jack
|
Hi Jack, Bert Haskins... he's replied to your topic, see msg reference below. /g/TekScopes/message/152031Most of his message is quote from previous messages... And his reply is a two liner, at the end. Rgrds, Fabio
|
Hi again for your interesting information. Amongst it you wrote "But Bert already chimed in that he has a NOS 465M module... so I think you already have a good lead"
I didn't receive that....was it related to my inquiry> and where will I find it. My regards
toggle quoted message
Show quoted text
-----Original Message----- From: Fabio Trevisan Sent: Thursday, November 1, 2018 10:59 AM To: [email protected]Subject: Re: [TekScopes] 425 Mil vertical module needed....seeking Hi Jack, The google translations are perfect, both in Portuguese and Spanish. Only the expression "mileage" in Portuguese and in Spanish are not usually used for anything else than vehicles. For the strict meaning of "usage", we just say "uso" (which is the exact translation of usage). In view of the answer from Dinos (thanks Dinos for correcting my assumptions), the contact with this seller in Brazil may not yield anything fruitful, as this guy seem to be a lonely wolf (he doesn't seem to have anything else than this 455 parts... and since the parts differ from the AN/USM 425 that you have, those parts probably aren't interchangeable with yours. But Bert already chimed in that he has a NOS 465M module... so I think you already have a good lead. About Tektronix, vs anything else... I also have mixed feelings about it... In my first job in the 80s, most of the scopes were Philips and I loved them... and we had one Tek 465 which I was never comfortable to work with. I found back then that arrangement of the time base knobs clumsy and awkward to use, and that the lack of an ALT delayed time base was really a big weakness... and I still think it was... I really don't know how Tek got away with selling so well the 46x line with that useless "Mix" mode, when they had earlier designs which already had the "ALT" time base. To some extent, some of that awkwardness in using the Tek scopes have disappeared as I became used to its "User Interface", and I learnt also to appreciate that many of those features that I took for granted on the Philips scopes were actually invented and appeared first on some Tek scope many years before (which I didn't know back then). Today I own a Tek 7623A with 3 plugins, and a jap scope, a 60MHz triple trace Kenwood scope... And I like both very much. The Kenwood is very powerful for its relatively simple design (there are no double sided PCBs!). Wish you luck with your 465M Rgrds, Fabio On Wed, Oct 31, 2018 at 06:22 PM, Jack wrote:
Hi...and thanks for the offer towards the end of your letter Fabio...I sent
in what I presume to be the correct 'slot', {Ou pergunte ao
vendedor...Escreva uma pergunta... }
this as follows:
Hi I need a vertical Amplifier (complete module) for a Tektronix M
425....do you have a low mileage; unit? My Regards Tony,.....
goldmort@onthenet,com.au.
Hola, necesito un amplificador vertical (m¨®dulo completo) para un Tektronix
M 425 ... ?tiene poco kilometraje? ?unidad? Mis saludos Tony, goldmort @
onthenet, com.au
Oi eu preciso de um amplificador vertical (m¨®dulo completo) para um
Tektronix M 425 .... voc¨º tem uma baixa quilometragem; unidade? Meus
cumprimentos
Tony, goldmort @ onthenet, com.au
Hopefully the Google translations do not see him lying on the ground
laughing and crying at the same time!!
Warm Regards Fabio
Jack
-----Original Message-----
From: Bert Haskins
Sent: Thursday, November 1, 2018 6:30 AM
To: [email protected]
Subject: Re: [TekScopes] 425 Mil vertical module needed....seeking
On 10/31/2018 11:56 AM, Fabio Trevisan wrote:
Hello Jack,
What you refer to as 425 Mil is, for correctness sake, a 465M or an AN/USM
425.
It confused me at first, as I didn't recall there was ever a 425
oscilloscope.
For what I know, the 465M is electronically similar to the civilian 465
(but even at electronic diagram level, there ARE differences), but, for
the sake of assemblies or sub-assemblies, they're essentially two
completely different oscilloscopes (i.e the boards are physically
different).
As mentioned on this () page of the
TekWiki website, the 465M is more similar to the civilian 455, than it is
to the 465.
I can't really tell by how much they are similar, but you may be able to
compare them by yourself by looking at the service manuals of both, which
are available on the TekWiki website.
The page for the civilian 455 is here:
I don't know much of either (455 or 465M) but, coincidentally, there's a
seller on a Brazilian auction site, selling the modules of a Tektronix
455:
I can't tell how similar those modules are (to your 465M) and if they can
serve as parts donors, but if you find out that they may help, you can try
to contact the seller, or I can help you with the purchase and shipping of
the module (or the parts) to your location, for their advertised cost and
shipping expenses to your place.
Note: I have no affiliation with the seller (and don't even know if I know
them, since the auction site only reveals the seller after you purchase
the item).
I normally wouldn't even make this offer, as shipping from Brazil is
usually prohibitive and the parts are not even mine... But since you're so
far away down under, I think that shipping from anywhere will be just as
difficult.
Please let me know if you want my help, or maybe some other folks in the
group will chime.
Krgrds,
Fabio
On Tue, Oct 30, 2018 at 06:52 PM, Jack wrote:
Hi. I'm a new member finding my way. I bought a lot of Tektronix scopes
for
the services when with Defence during Vietnam era and visited Tektonix at
North Ryde (NSW)
to see about repairs to (I think it's a 564) I still have....still not
working
I guess after having a new very high voltage insulated transformer wound
for
CRT filament...two actually, the other must be around "somewhere". I
developed a healthy fear of Tektronic CRO's owing to the prices Tektronix
charged for repairs..
I have a 425 Mil with broken switch.in Vertical section It's
unrepairable.
Whilst I could sooner or later find a parts CRO, sight unseen on eBay for
example, it may also be on the way out. I think the plastic used in
Tektronix
may be the lowest quality amongst high quality devices , or maybe they
just
specify 'shall be or a type formula and manufacture which will maintain
all
utility until the end of time'
I was directed to your group (Hi...there) . To get to the essential point
Would some person have a reasonably low mileage vertical module,
complete,
which I could buy? Please advise me if so....Australia would be best of
course
but 'anywhere'. Also...to undo some confusion...I've been told 425 and
465 are
"intrinsically" the same CRO...obviously without the Mil labelling... .
Does
that mean parts are interchangeable?
One reason I ask is that I was also told that the 425 being Military
contract
and Mil Spec was built to be readily pulled down for field repairs. Is
that
true?...Is that a quality the 465 does not replicate? if so it may mean
that
...just as an example...the vertical amp module from a 465 may have some
mounting differences from the 425.
On the other hand it may not. Perhaps someone familiar with this type
will
bring me to a state of awareness even wisdom regarding my CRO. ...oh...
other
than having one channel down it seems to work ok and 'oh' again...when I
originally pulled it down a piece of curved springy metal fell out.
Whence it
exactly originated I have no idea...'somewhere inside'. .It may be a
method
of maintaining the case at frame potential, under pressure as one
reassembles
the CRO...so perhaps it 'jammed' between a plate on the chassis and the
bottom cover. It could have come from elsewhere or it might not be from
the
CRO at all.....That said, Im pretty sure I saw an exploded view one time
where
this curved metal piece as shown hanging in mid-air underneath the
chassis.
Have I been able to find that particular exploded view again (that was 3
years
ago)...of course not!!
Any passing of knowledge wisdom common sense mindfulness and most of all
perhaps a complete vertical amplifier will be very well received.
--
Jack
I have a 465M vertical module I bought as a backup.
NOS but not tested within the last five years or more.
Thanks,
Bert
--
Jack
-- Jack
|
Ok Fabio...finally I see it ...well some of it....Is that Brazilian site related to Bert? There's no contact detail for him.
Can you assist there?...The vertical on the Brazilian site is "identical" in appearance to the 425 but I recall, and must re-check his letter,
Dinos advising they are not related CRO's. I'm a bit like Alice in Wonderland at the moment.
My Regards
toggle quoted message
Show quoted text
-----Original Message----- From: Fabio Trevisan Sent: Thursday, November 1, 2018 10:49 PM To: [email protected]Subject: Re: [TekScopes] 425 Mil vertical module needed....seeking Hi Jack, Bert Haskins... he's replied to your topic, see msg reference below. /g/TekScopes/message/152031Most of his message is quote from previous messages... And his reply is a two liner, at the end. Rgrds, Fabio -- Jack
|
Bert Haskins......
Calling Bert Haskins...calling Bert Haskins ....CALLING BERT HASKINS
Confusion reigns....I'm only new here....I don't know whether this reply goes to you or Fabio. I'm a bit of a 'headless chook' at present, Bert...
Are you in Brazil? Bert
Can you contact me on goldmort@... with a price for the vertical? Yes I am interested.
--
Jack
|
Hi thanks Harvey....yes that's about it.....time saving with a good spares inventory ....replace the faulty aspect of equipment and then send through the system
to component level repairs. Repair was not always attempted and "U/S" tags were plentiful. Reliability and cost were a decision. I recall when aircraft mods were
done in Vietnam conflict we just dumped $millions in unusable inventory, even here. Our (Defence's) vibration and environmental equipment was given to AWA,
which then charged Defence for the use of it. I found that..a kind-of peculiar arrangement. Labour costs yes, but use of the gear wasn't confined to us.
Component level was not always done at Echelon...a level of testing might be done and a decision made whether to send to the manufacturer but at the card level
when it was a card....it may more likely have been tagged 'U/S' scrupulously recorded then binned, later ...perhaps many years later and when security allowed it and the
conflict was over.....go through the 'disposals auctions'. The equipment need to ensure the gear met services' specs was too complex and expensive in some cases.
Reliability warrantied as being certain is primary especially in weaponry and radar you mentioned demands manufacturer-level accuracy. My recollection is that
it was not until after 'Korea' thatmodularisation became common...the TRC77 for example in a small way. Until then changing tubes was the field level repair.
Owing to advice from Dinos I was able to realise what I thought a nightmare, highly inefficient teardown for a small repair was in fact simple...It took about 10 minutes
pull the module once the advice I was given made sense...in the field with spares available it was probably a half hour turnaround. Edgar Allen Poe's fear of the Raven
tapping at his door was no greater than my fear of Tektronix CRO's tapping at my confusion of fear and lust when a Tektronix came sashaying into view. "The best way
to get away from temptation is to give into it" wrote Oscar Wilde,,,"Resist it, and your soul grows sick with longing for the things it has forbidden to itself "
That is mankind's Achille's heel.
One look inside a Tektronix when I was 20 scared me into a sort of misty coma...Milspec radio's...ok....general test equipment ok...BWD CRO's....well ok. Tektronix
aaaaaaaaaaaaagh!! A contact with Tektronix supervisor out at Nth Ryde forty years ago led to hair-raising information on repair costs. I can only thank heaven and
Dinos and Fabio that I bought a Mil unit, unwitting of its advantages. What I thought would be a simple repair isn't at component level but IS at module level.
Reading some of the problems raised even in my brief experience with tekscopes made it clear that this group is an essential part of dealing with Tektronix gear.
One day I suppose, the manufacturers of Prozac and Zoloft will try to buy it out, owing to the business they are losing through the support given each other in forum.
Voila
toggle quoted message
Show quoted text
-----Original Message----- From: Harvey White Sent: Thursday, November 1, 2018 9:38 AM To: TekScopes@groups. Cc: [email protected]Subject: Re: [TekScopes] 425 Mil vertical module needed....seeking On Wed, 31 Oct 2018 08:56:47 -0700, you wrote: Many of the functions of a Mil qualified piece of test equipment (or flightline, I'm extrapolating from that) are as follows: 1) mil qualified parts (for TTL, for instance, expanded temperature range and +/- 0.5 volt tolerance on VCC rather than 0.25 volts) 2) vibration and temperature tolerances 3) (perhaps most important): the ability to repair a unit by (on the flightline) by replacing an whole unit, for instance, a complete power supply, or a vertical channel, or a CRT/display unit, that kind of thing. This is, I suspect, where the (apparently) massive difference in physical construction might come from. Diagnostics wise, you'd go out to the aircraft, diagnose the radar, and find out what is malfunctioning (transmitter, receiver, processor, etc). You'd black box replace the entire unit. That unit would go back to the depot. At the depot, special test equipment (bought from the radar's manufacturer) would diagnose the failing unit to a particular board. That board would be replaced and the unit would be re-tested. The failing board would go back to the manufacturer for testing and repair. Sound familiar? I'm suspecting that the physical construction of this scope allowed this kind of repair. Not sure, though. Harvey Hello Jack,
What you refer to as 425 Mil is, for correctness sake, a 465M or an AN/USM 425.
It confused me at first, as I didn't recall there was ever a 425 oscilloscope.
For what I know, the 465M is electronically similar to the civilian 465 (but even at electronic diagram level, there ARE differences), but, for the sake of assemblies or sub-assemblies, they're essentially two completely different oscilloscopes (i.e the boards are physically different).
As mentioned on this () page of the TekWiki website, the 465M is more similar to the civilian 455, than it is to the 465.
I can't really tell by how much they are similar, but you may be able to compare them by yourself by looking at the service manuals of both, which are available on the TekWiki website.
The page for the civilian 455 is here:
I don't know much of either (455 or 465M) but, coincidentally, there's a seller on a Brazilian auction site, selling the modules of a Tektronix 455:
I can't tell how similar those modules are (to your 465M) and if they can serve as parts donors, but if you find out that they may help, you can try to contact the seller, or I can help you with the purchase and shipping of the module (or the parts) to your location, for their advertised cost and shipping expenses to your place.
Note: I have no affiliation with the seller (and don't even know if I know them, since the auction site only reveals the seller after you purchase the item).
I normally wouldn't even make this offer, as shipping from Brazil is usually prohibitive and the parts are not even mine... But since you're so far away down under, I think that shipping from anywhere will be just as difficult.
Please let me know if you want my help, or maybe some other folks in the group will chime.
Krgrds,
Fabio
On Tue, Oct 30, 2018 at 06:52 PM, Jack wrote:
Hi. I'm a new member finding my way. I bought a lot of Tektronix scopes for
the services when with Defence during Vietnam era and visited Tektonix at
North Ryde (NSW)
to see about repairs to (I think it's a 564) I still have....still not working
I guess after having a new very high voltage insulated transformer wound for
CRT filament...two actually, the other must be around "somewhere". I
developed a healthy fear of Tektronic CRO's owing to the prices Tektronix
charged for repairs..
I have a 425 Mil with broken switch.in Vertical section It's unrepairable.
Whilst I could sooner or later find a parts CRO, sight unseen on eBay for
example, it may also be on the way out. I think the plastic used in Tektronix
may be the lowest quality amongst high quality devices , or maybe they just
specify 'shall be or a type formula and manufacture which will maintain all
utility until the end of time'
I was directed to your group (Hi...there) . To get to the essential point
Would some person have a reasonably low mileage vertical module, complete,
which I could buy? Please advise me if so....Australia would be best of course
but 'anywhere'. Also...to undo some confusion...I've been told 425 and 465 are
"intrinsically" the same CRO...obviously without the Mil labelling... . Does
that mean parts are interchangeable?
One reason I ask is that I was also told that the 425 being Military contract
and Mil Spec was built to be readily pulled down for field repairs. Is that
true?...Is that a quality the 465 does not replicate? if so it may mean that
...just as an example...the vertical amp module from a 465 may have some
mounting differences from the 425.
On the other hand it may not. Perhaps someone familiar with this type will
bring me to a state of awareness even wisdom regarding my CRO. ...oh... other
than having one channel down it seems to work ok and 'oh' again...when I
originally pulled it down a piece of curved springy metal fell out. Whence it
exactly originated I have no idea...'somewhere inside'. .It may be a method
of maintaining the case at frame potential, under pressure as one reassembles
the CRO...so perhaps it 'jammed' between a plate on the chassis and the
bottom cover. It could have come from elsewhere or it might not be from the
CRO at all.....That said, Im pretty sure I saw an exploded view one time where
this curved metal piece as shown hanging in mid-air underneath the chassis.
Have I been able to find that particular exploded view again (that was 3 years
ago)...of course not!!
Any passing of knowledge wisdom common sense mindfulness and most of all
perhaps a complete vertical amplifier will be very well received.
--
Jack
-- Jack
|
Did you mean the PRC77? if so, both of its predecessors, the PRC10 and the PRC25 were module based radios that were designed to be repaired by swapping in spare, pre-tuned modules. I did Interchangeability testing on the PRC77, along with final test at the Cincinnati Electronics factory.
Michael A. Terrell
toggle quoted message
Show quoted text
-----Original Message----- From: Jack <goldmort@...>
Sent: Nov 2, 2018 2:16 PM
To: [email protected]
Subject: Re: [TekScopes] 425 Mil vertical module needed....seeking
Hi thanks Harvey....yes that's about it.....time saving with a good spares
inventory ....replace the faulty aspect of equipment and then send through
the system
to component level repairs. Repair was not always attempted and "U/S" tags
were plentiful. Reliability and cost were a decision. I recall when aircraft
mods were
done in Vietnam conflict we just dumped $millions in unusable inventory,
even here. Our (Defence's) vibration and environmental equipment was given
to AWA,
which then charged Defence for the use of it. I found that..a kind-of
peculiar arrangement. Labour costs yes, but use of the gear wasn't confined
to us.
Component level was not always done at Echelon...a level of testing might be
done and a decision made whether to send to the manufacturer but at the card
level
when it was a card....it may more likely have been tagged 'U/S' scrupulously
recorded then binned, later ...perhaps many years later and when security
allowed it and the
conflict was over.....go through the 'disposals auctions'. The equipment
need to ensure the gear met services' specs was too complex and expensive in
some cases.
Reliability warrantied as being certain is primary especially in weaponry
and radar you mentioned demands manufacturer-level accuracy. My recollection
is that
it was not until after 'Korea' thatmodularisation became common...the TRC77
for example in a small way. Until then changing tubes was the field level
repair.
|
Hi Michael....how interesting....no not the PRC, I know the sets you mean though....this was a 'pioneer' set...CW on Tx/Rx and AM on Rx only. RT654A/TRC 77. Still sought after
as a great set....crystal locked but can VFO their current drain on Rx was very small....The US equivalent of Special Air Service regiment (they don't like being called SAS by civies)
used them. I think the term was 'pioneer'...Parts of it were hinged to swing up for service...well so did the p/s of the BC 342 I guess so maybe that's not so modular! I own one so I must
have a closer look..it's been on the shelf for some years, I never even tried it for working but set about trying to collect the associated bits and pieces...not easy here as the gear
in strictly USA. I think there is one of more TRC77 groups amongst the Hams....I recall seeing a very long photographic blurb on them.
I t was a lot easier to carry lightweight spare modules than complete units...but that was really 50's technology emerging as weight diminished with solid state and extra low voltage.
What I see as the forerunner of the PRC 77, the BC1000, was not an easy repair.
Did you find much card failure?
My regards
toggle quoted message
Show quoted text
-----Original Message----- From: Michael A. Terrell Sent: Saturday, November 3, 2018 5:17 AM To: [email protected]Subject: Re: [TekScopes] 425 Mil vertical module needed....seeking Did you mean the PRC77? if so, both of its predecessors, the PRC10 and the PRC25 were module based radios that were designed to be repaired by swapping in spare, pre-tuned modules. I did Interchangeability testing on the PRC77, along with final test at the Cincinnati Electronics factory. Michael A. Terrell -----Original Message----- From: Jack <goldmort@...>
Sent: Nov 2, 2018 2:16 PM
To: [email protected]
Subject: Re: [TekScopes] 425 Mil vertical module needed....seeking
Hi thanks Harvey....yes that's about it.....time saving with a good spares
inventory ....replace the faulty aspect of equipment and then send through
the system
to component level repairs. Repair was not always attempted and "U/S" tags
were plentiful. Reliability and cost were a decision. I recall when aircraft
mods were
done in Vietnam conflict we just dumped $millions in unusable inventory,
even here. Our (Defence's) vibration and environmental equipment was given
to AWA,
which then charged Defence for the use of it. I found that..a kind-of
peculiar arrangement. Labour costs yes, but use of the gear wasn't confined
to us.
Component level was not always done at Echelon...a level of testing might be
done and a decision made whether to send to the manufacturer but at the card
level
when it was a card....it may more likely have been tagged 'U/S' scrupulously
recorded then binned, later ...perhaps many years later and when security
allowed it and the
conflict was over.....go through the 'disposals auctions'. The equipment
need to ensure the gear met services' specs was too complex and expensive in
some cases.
Reliability warrantied as being certain is primary especially in weaponry
and radar you mentioned demands manufacturer-level accuracy. My recollection
is that
it was not until after 'Korea' thatmodularisation became common...the TRC77
for example in a small way. Until then changing tubes was the field level
repair. -- Jack
|
Hi again Michael...I will not go any further with the reply I sent you on TREC77 as it dawned on me (I'm a bit slow) that it is not connected to the Tektronix
but happy to hear more on my own email if you wish.
toggle quoted message
Show quoted text
-----Original Message----- From: Michael A. Terrell Sent: Saturday, November 3, 2018 5:17 AM To: [email protected]Subject: Re: [TekScopes] 425 Mil vertical module needed....seeking Did you mean the PRC77? if so, both of its predecessors, the PRC10 and the PRC25 were module based radios that were designed to be repaired by swapping in spare, pre-tuned modules. I did Interchangeability testing on the PRC77, along with final test at the Cincinnati Electronics factory. Michael A. Terrell -----Original Message----- From: Jack <goldmort@...>
Sent: Nov 2, 2018 2:16 PM
To: [email protected]
Subject: Re: [TekScopes] 425 Mil vertical module needed....seeking
Hi thanks Harvey....yes that's about it.....time saving with a good spares
inventory ....replace the faulty aspect of equipment and then send through
the system
to component level repairs. Repair was not always attempted and "U/S" tags
were plentiful. Reliability and cost were a decision. I recall when aircraft
mods were
done in Vietnam conflict we just dumped $millions in unusable inventory,
even here. Our (Defence's) vibration and environmental equipment was given
to AWA,
which then charged Defence for the use of it. I found that..a kind-of
peculiar arrangement. Labour costs yes, but use of the gear wasn't confined
to us.
Component level was not always done at Echelon...a level of testing might be
done and a decision made whether to send to the manufacturer but at the card
level
when it was a card....it may more likely have been tagged 'U/S' scrupulously
recorded then binned, later ...perhaps many years later and when security
allowed it and the
conflict was over.....go through the 'disposals auctions'. The equipment
need to ensure the gear met services' specs was too complex and expensive in
some cases.
Reliability warrantied as being certain is primary especially in weaponry
and radar you mentioned demands manufacturer-level accuracy. My recollection
is that
it was not until after 'Korea' thatmodularisation became common...the TRC77
for example in a small way. Until then changing tubes was the field level
repair. -- Jack
|
On Sat, 3 Nov 2018 04:16:17 +1000, you wrote: You'd be surprised that the basic difference (perhaps) in the MIL units vs. the commercial units is the ability to remove subsystems. This does not always follow with (for instance), TM500 and TM5000 series. Scopes, however, I'm willing to go with a different model. Having said that, the schematics are often quite similar, and if you can repair a MIL unit without black boxing it, you can repair a civilian unit (especially by swapping boards.... <innocent look>). The similarity happens when you do what's equivalent to depot level test (and my job was mostly designing flightline test equipment). Regardless of the complexity of the item, once you start to diagnose down to a component (if possible), it's really the same thing, regardless of where it happens, depot, manufacturer's testing and rework, or your own lab. Harvey Hi thanks Harvey....yes that's about it.....time saving with a good spares
inventory ....replace the faulty aspect of equipment and then send through
the system
to component level repairs. Repair was not always attempted and "U/S" tags
were plentiful. Reliability and cost were a decision. I recall when aircraft
mods were
done in Vietnam conflict we just dumped $millions in unusable inventory,
even here. Our (Defence's) vibration and environmental equipment was given
to AWA,
which then charged Defence for the use of it. I found that..a kind-of
peculiar arrangement. Labour costs yes, but use of the gear wasn't confined
to us.
Component level was not always done at Echelon...a level of testing might be
done and a decision made whether to send to the manufacturer but at the card
level
when it was a card....it may more likely have been tagged 'U/S' scrupulously
recorded then binned, later ...perhaps many years later and when security
allowed it and the
conflict was over.....go through the 'disposals auctions'. The equipment
need to ensure the gear met services' specs was too complex and expensive in
some cases.
Reliability warrantied as being certain is primary especially in weaponry
and radar you mentioned demands manufacturer-level accuracy. My recollection
is that
it was not until after 'Korea' thatmodularisation became common...the TRC77
for example in a small way. Until then changing tubes was the field level
repair.
Owing to advice from Dinos I was able to realise what I thought a nightmare,
highly inefficient teardown for a small repair was in fact simple...It took
about 10 minutes
pull the module once the advice I was given made sense...in the field with
spares available it was probably a half hour turnaround. Edgar Allen Poe's
fear of the Raven
tapping at his door was no greater than my fear of Tektronix CRO's tapping
at my confusion of fear and lust when a Tektronix came sashaying into view.
"The best way
to get away from temptation is to give into it" wrote Oscar
Wilde,,,"Resist it, and your soul grows sick with longing for the things it
has forbidden to itself "
That is mankind's Achille's heel.
One look inside a Tektronix when I was 20 scared me into a sort of misty
coma...Milspec radio's...ok....general test equipment ok...BWD CRO's....well
ok. Tektronix
aaaaaaaaaaaaagh!! A contact with Tektronix supervisor out at Nth Ryde forty
years ago led to hair-raising information on repair costs. I can only thank
heaven and
Dinos and Fabio that I bought a Mil unit, unwitting of its advantages. What
I thought would be a simple repair isn't at component level but IS at module
level.
Reading some of the problems raised even in my brief experience with
tekscopes made it clear that this group is an essential part of dealing with
Tektronix gear.
One day I suppose, the manufacturers of Prozac and Zoloft will try to buy it
out, owing to the business they are losing through the support given each
other in forum.
Voila
-----Original Message-----
From: Harvey White
Sent: Thursday, November 1, 2018 9:38 AM
To: TekScopes@groups.
Cc: [email protected]
Subject: Re: [TekScopes] 425 Mil vertical module needed....seeking
On Wed, 31 Oct 2018 08:56:47 -0700, you wrote:
Many of the functions of a Mil qualified piece of test equipment (or
flightline, I'm extrapolating from that) are as follows:
1) mil qualified parts (for TTL, for instance, expanded temperature
range and +/- 0.5 volt tolerance on VCC rather than 0.25 volts)
2) vibration and temperature tolerances
3) (perhaps most important): the ability to repair a unit by (on the
flightline) by replacing an whole unit, for instance, a complete power
supply, or a vertical channel, or a CRT/display unit, that kind of
thing.
This is, I suspect, where the (apparently) massive difference in
physical construction might come from.
Diagnostics wise, you'd go out to the aircraft, diagnose the radar,
and find out what is malfunctioning (transmitter, receiver, processor,
etc).
You'd black box replace the entire unit.
That unit would go back to the depot. At the depot, special test
equipment (bought from the radar's manufacturer) would diagnose the
failing unit to a particular board. That board would be replaced and
the unit would be re-tested. The failing board would go back to the
manufacturer for testing and repair.
Sound familiar?
I'm suspecting that the physical construction of this scope allowed
this kind of repair. Not sure, though.
Harvey
Hello Jack,
What you refer to as 425 Mil is, for correctness sake, a 465M or an AN/USM
425.
It confused me at first, as I didn't recall there was ever a 425
oscilloscope.
For what I know, the 465M is electronically similar to the civilian 465
(but even at electronic diagram level, there ARE differences), but, for the
sake of assemblies or sub-assemblies, they're essentially two completely
different oscilloscopes (i.e the boards are physically different).
As mentioned on this () page of the
TekWiki website, the 465M is more similar to the civilian 455, than it is
to the 465.
I can't really tell by how much they are similar, but you may be able to
compare them by yourself by looking at the service manuals of both, which
are available on the TekWiki website.
The page for the civilian 455 is here:
I don't know much of either (455 or 465M) but, coincidentally, there's a
seller on a Brazilian auction site, selling the modules of a Tektronix 455:
I can't tell how similar those modules are (to your 465M) and if they can
serve as parts donors, but if you find out that they may help, you can try
to contact the seller, or I can help you with the purchase and shipping of
the module (or the parts) to your location, for their advertised cost and
shipping expenses to your place.
Note: I have no affiliation with the seller (and don't even know if I know
them, since the auction site only reveals the seller after you purchase the
item).
I normally wouldn't even make this offer, as shipping from Brazil is
usually prohibitive and the parts are not even mine... But since you're so
far away down under, I think that shipping from anywhere will be just as
difficult.
Please let me know if you want my help, or maybe some other folks in the
group will chime.
Krgrds,
Fabio
On Tue, Oct 30, 2018 at 06:52 PM, Jack wrote:
Hi. I'm a new member finding my way. I bought a lot of Tektronix scopes
for
the services when with Defence during Vietnam era and visited Tektonix at
North Ryde (NSW)
to see about repairs to (I think it's a 564) I still have....still not
working
I guess after having a new very high voltage insulated transformer wound
for
CRT filament...two actually, the other must be around "somewhere". I
developed a healthy fear of Tektronic CRO's owing to the prices Tektronix
charged for repairs..
I have a 425 Mil with broken switch.in Vertical section It's
unrepairable.
Whilst I could sooner or later find a parts CRO, sight unseen on eBay for
example, it may also be on the way out. I think the plastic used in
Tektronix
may be the lowest quality amongst high quality devices , or maybe they
just
specify 'shall be or a type formula and manufacture which will maintain
all
utility until the end of time'
I was directed to your group (Hi...there) . To get to the essential point
Would some person have a reasonably low mileage vertical module,
complete,
which I could buy? Please advise me if so....Australia would be best of
course
but 'anywhere'. Also...to undo some confusion...I've been told 425 and
465 are
"intrinsically" the same CRO...obviously without the Mil labelling... .
Does
that mean parts are interchangeable?
One reason I ask is that I was also told that the 425 being Military
contract
and Mil Spec was built to be readily pulled down for field repairs. Is
that
true?...Is that a quality the 465 does not replicate? if so it may mean
that
...just as an example...the vertical amp module from a 465 may have some
mounting differences from the 425.
On the other hand it may not. Perhaps someone familiar with this type
will
bring me to a state of awareness even wisdom regarding my CRO. ...oh...
other
than having one channel down it seems to work ok and 'oh' again...when I
originally pulled it down a piece of curved springy metal fell out.
Whence it
exactly originated I have no idea...'somewhere inside'. .It may be a
method
of maintaining the case at frame potential, under pressure as one
reassembles
the CRO...so perhaps it 'jammed' between a plate on the chassis and the
bottom cover. It could have come from elsewhere or it might not be from
the
CRO at all.....That said, Im pretty sure I saw an exploded view one time
where
this curved metal piece as shown hanging in mid-air underneath the
chassis.
Have I been able to find that particular exploded view again (that was 3
years
ago)...of course not!!
Any passing of knowledge wisdom common sense mindfulness and most of all
perhaps a complete vertical amplifier will be very well received.
--
Jack
|
Hi Harvey..of course take your point on the final comment you made...whether the depot has 'everything needed' to test
the card to environmental spec was in my mind. I suppose in a way it's like say the ART-13 or BC-348...serviced by depot
but post WW11 some number were completely refurbished for Pan Am and other airlines, which may have required (speculating)
testing in actual conditions to warranty their reliability. Finding a defective part is finding a defective part..and replacing it..is
same wherever done. Military designed some redundant circuitry I believe but I wonder...when your blokes repaired at
component level, did they also replace a string of components say between the crook one and the next junction or just the dud?
I experienced the easy-extraction system system with the URR391 for example but my experience with CRO's outside of the odd occasion
is quite small.
My regards
toggle quoted message
Show quoted text
-----Original Message----- From: Harvey White Sent: Saturday, November 3, 2018 9:51 AM To: [email protected]Subject: Re: [TekScopes] 425 Mil vertical module needed....seeking On Sat, 3 Nov 2018 04:16:17 +1000, you wrote: You'd be surprised that the basic difference (perhaps) in the MIL units vs. the commercial units is the ability to remove subsystems. This does not always follow with (for instance), TM500 and TM5000 series. Scopes, however, I'm willing to go with a different model. Having said that, the schematics are often quite similar, and if you can repair a MIL unit without black boxing it, you can repair a civilian unit (especially by swapping boards.... <innocent look>). The similarity happens when you do what's equivalent to depot level test (and my job was mostly designing flightline test equipment). Regardless of the complexity of the item, once you start to diagnose down to a component (if possible), it's really the same thing, regardless of where it happens, depot, manufacturer's testing and rework, or your own lab. Harvey Hi thanks Harvey....yes that's about it.....time saving with a good spares
inventory ....replace the faulty aspect of equipment and then send through
the system
to component level repairs. Repair was not always attempted and "U/S" tags
were plentiful. Reliability and cost were a decision. I recall when aircraft
mods were
done in Vietnam conflict we just dumped $millions in unusable inventory,
even here. Our (Defence's) vibration and environmental equipment was given
to AWA,
which then charged Defence for the use of it. I found that..a kind-of
peculiar arrangement. Labour costs yes, but use of the gear wasn't confined
to us.
Component level was not always done at Echelon...a level of testing might be
done and a decision made whether to send to the manufacturer but at the card
level
when it was a card....it may more likely have been tagged 'U/S' scrupulously
recorded then binned, later ...perhaps many years later and when security
allowed it and the
conflict was over.....go through the 'disposals auctions'. The equipment
need to ensure the gear met services' specs was too complex and expensive in
some cases.
Reliability warrantied as being certain is primary especially in weaponry
and radar you mentioned demands manufacturer-level accuracy. My recollection
is that
it was not until after 'Korea' thatmodularisation became common...the TRC77
for example in a small way. Until then changing tubes was the field level
repair.
Owing to advice from Dinos I was able to realise what I thought a nightmare,
highly inefficient teardown for a small repair was in fact simple...It took
about 10 minutes
pull the module once the advice I was given made sense...in the field with
spares available it was probably a half hour turnaround. Edgar Allen Poe's
fear of the Raven
tapping at his door was no greater than my fear of Tektronix CRO's tapping
at my confusion of fear and lust when a Tektronix came sashaying into view.
"The best way
to get away from temptation is to give into it" wrote Oscar
Wilde,,,"Resist it, and your soul grows sick with longing for the things it
has forbidden to itself "
That is mankind's Achille's heel.
One look inside a Tektronix when I was 20 scared me into a sort of misty
coma...Milspec radio's...ok....general test equipment ok...BWD CRO's....well
ok. Tektronix
aaaaaaaaaaaaagh!! A contact with Tektronix supervisor out at Nth Ryde forty
years ago led to hair-raising information on repair costs. I can only thank
heaven and
Dinos and Fabio that I bought a Mil unit, unwitting of its advantages. What
I thought would be a simple repair isn't at component level but IS at module
level.
Reading some of the problems raised even in my brief experience with
tekscopes made it clear that this group is an essential part of dealing with
Tektronix gear.
One day I suppose, the manufacturers of Prozac and Zoloft will try to buy it
out, owing to the business they are losing through the support given each
other in forum.
Voila
-----Original Message-----
From: Harvey White
Sent: Thursday, November 1, 2018 9:38 AM
To: TekScopes@groups.
Cc: [email protected]
Subject: Re: [TekScopes] 425 Mil vertical module needed....seeking
On Wed, 31 Oct 2018 08:56:47 -0700, you wrote:
Many of the functions of a Mil qualified piece of test equipment (or
flightline, I'm extrapolating from that) are as follows:
1) mil qualified parts (for TTL, for instance, expanded temperature
range and +/- 0.5 volt tolerance on VCC rather than 0.25 volts)
2) vibration and temperature tolerances
3) (perhaps most important): the ability to repair a unit by (on the
flightline) by replacing an whole unit, for instance, a complete power
supply, or a vertical channel, or a CRT/display unit, that kind of
thing.
This is, I suspect, where the (apparently) massive difference in
physical construction might come from.
Diagnostics wise, you'd go out to the aircraft, diagnose the radar,
and find out what is malfunctioning (transmitter, receiver, processor,
etc).
You'd black box replace the entire unit.
That unit would go back to the depot. At the depot, special test
equipment (bought from the radar's manufacturer) would diagnose the
failing unit to a particular board. That board would be replaced and
the unit would be re-tested. The failing board would go back to the
manufacturer for testing and repair.
Sound familiar?
I'm suspecting that the physical construction of this scope allowed
this kind of repair. Not sure, though.
Harvey
Hello Jack,
What you refer to as 425 Mil is, for correctness sake, a 465M or an AN/USM
425.
It confused me at first, as I didn't recall there was ever a 425
oscilloscope.
For what I know, the 465M is electronically similar to the civilian 465
(but even at electronic diagram level, there ARE differences), but, for the
sake of assemblies or sub-assemblies, they're essentially two completely
different oscilloscopes (i.e the boards are physically different).
As mentioned on this () page of the
TekWiki website, the 465M is more similar to the civilian 455, than it is
to the 465.
I can't really tell by how much they are similar, but you may be able to
compare them by yourself by looking at the service manuals of both, which
are available on the TekWiki website.
The page for the civilian 455 is here:
I don't know much of either (455 or 465M) but, coincidentally, there's a
seller on a Brazilian auction site, selling the modules of a Tektronix 455:
I can't tell how similar those modules are (to your 465M) and if they can
serve as parts donors, but if you find out that they may help, you can try
to contact the seller, or I can help you with the purchase and shipping of
the module (or the parts) to your location, for their advertised cost and
shipping expenses to your place.
Note: I have no affiliation with the seller (and don't even know if I know
them, since the auction site only reveals the seller after you purchase the
item).
I normally wouldn't even make this offer, as shipping from Brazil is
usually prohibitive and the parts are not even mine... But since you're so
far away down under, I think that shipping from anywhere will be just as
difficult.
Please let me know if you want my help, or maybe some other folks in the
group will chime.
Krgrds,
Fabio
On Tue, Oct 30, 2018 at 06:52 PM, Jack wrote:
Hi. I'm a new member finding my way. I bought a lot of Tektronix scopes
for
the services when with Defence during Vietnam era and visited Tektonix at
North Ryde (NSW)
to see about repairs to (I think it's a 564) I still have....still not
working
I guess after having a new very high voltage insulated transformer wound
for
CRT filament...two actually, the other must be around "somewhere". I
developed a healthy fear of Tektronic CRO's owing to the prices Tektronix
charged for repairs..
I have a 425 Mil with broken switch.in Vertical section It's
unrepairable.
Whilst I could sooner or later find a parts CRO, sight unseen on eBay for
example, it may also be on the way out. I think the plastic used in
Tektronix
may be the lowest quality amongst high quality devices , or maybe they
just
specify 'shall be or a type formula and manufacture which will maintain
all
utility until the end of time'
I was directed to your group (Hi...there) . To get to the essential point
Would some person have a reasonably low mileage vertical module,
complete,
which I could buy? Please advise me if so....Australia would be best of
course
but 'anywhere'. Also...to undo some confusion...I've been told 425 and
465 are
"intrinsically" the same CRO...obviously without the Mil labelling... .
Does
that mean parts are interchangeable?
One reason I ask is that I was also told that the 425 being Military
contract
and Mil Spec was built to be readily pulled down for field repairs. Is
that
true?...Is that a quality the 465 does not replicate? if so it may mean
that
...just as an example...the vertical amp module from a 465 may have some
mounting differences from the 425.
On the other hand it may not. Perhaps someone familiar with this type
will
bring me to a state of awareness even wisdom regarding my CRO. ...oh...
other
than having one channel down it seems to work ok and 'oh' again...when I
originally pulled it down a piece of curved springy metal fell out.
Whence it
exactly originated I have no idea...'somewhere inside'. .It may be a
method
of maintaining the case at frame potential, under pressure as one
reassembles
the CRO...so perhaps it 'jammed' between a plate on the chassis and the
bottom cover. It could have come from elsewhere or it might not be from
the
CRO at all.....That said, Im pretty sure I saw an exploded view one time
where
this curved metal piece as shown hanging in mid-air underneath the
chassis.
Have I been able to find that particular exploded view again (that was 3
years
ago)...of course not!!
Any passing of knowledge wisdom common sense mindfulness and most of all
perhaps a complete vertical amplifier will be very well received.
--
Jack
-- Jack
|
Fabio Trevisan
Michael A. Terrell