Thanks. I should have added that those without access to a mill can simply cut a 3" hole in the cover protect it with a fan grill.
john - AE0AM
|
I did the conversion on my 2465 at one point, even wired up the temp
controlled circuit from the 2465Bs on a breadboard to control it. The
goddamn whine of the 60mm fan drove me crazy, and so at one point I found a
NOS Siemens motor and converted it back. The old style impeller fan is as
near quiet as makes no difference - my old 485 is the same way.
I think for most squealing or rattling motors you can flush them with IPA
and re-lube them with a couple of drops of oil, live happily ever after.
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On Wed, Aug 7, 2019 at 6:47 PM tom jobe <tomjobe@...> wrote: Thanks John,
That is a great solution to a long standing problem on the low S/N 24x5
scopes.
No more having to deal with the broken fan collets, old fan motor
issues, etc!
tom jobe...
On 8/6/2019 10:29 AM, John Bennett wrote:
Chuck Harris's advice is spot on, but the plastic collet around the motor shaft that attaches to the fan is old and very brittle, and it breaks
easily. When mine broke, I ripped out motor and fan, and replaced with a
Noctua NF-A6x25 FLX 12V fan ($15 from Amazon). This requires milling the
back cover, and inserting a 39ohm 2W (value experimentally determined for
this fan under load) resistor to drop the existing motor 15V to 12V. The
wire harness that comes with the Noctua fan makes this easy (cut the yellow
wire in the harness when you replace the resistor). Upside is good airflow
and quiet fan. Link to pictures:
/g/TekScopes/album?id=94011
john - AE0AM
|
Thanks John,
That is a great solution to a long standing problem on the low S/N 24x5 scopes.
No more having to? deal with the broken fan collets, old fan motor issues, etc!
tom jobe...
toggle quoted message
Show quoted text
On 8/6/2019 10:29 AM, John Bennett wrote: Chuck Harris's advice is spot on, but the plastic collet around the motor shaft that attaches to the fan is old and very brittle, and it breaks easily. When mine broke, I ripped out motor and fan, and replaced with a Noctua NF-A6x25 FLX 12V fan ($15 from Amazon). This requires milling the back cover, and inserting a 39ohm 2W (value experimentally determined for this fan under load) resistor to drop the existing motor 15V to 12V. The wire harness that comes with the Noctua fan makes this easy (cut the yellow wire in the harness when you replace the resistor). Upside is good airflow and quiet fan. Link to pictures: /g/TekScopes/album?id=94011
john - AE0AM
|
Re: Tek 500 connectors or similar? A bit off topic!!!
On 8/7/2019 9:57 AM, Daniel Koller via Groups.Io wrote: Hi All,
? Thanks for the advice.
? Yes, it appears the Amphenol connectos in the 500 series are series 26 connectors.? ?Probably the *easiest* thing for me to do is to keep using them.? ? There are used ones available on e-bay for $12.95, likely harvested from a Tek scope.? ?But this is like organ harvesting.? ?If I buy that one on e-bay, do I encourage someone to strip them out of good, working plug-ins that might otherwise get sold intact to a wanting collector?? It's like the ivory trade - I'd hate to encourage it. In a way, no, you don't encourage it.? You didn't buy the connectors with a "ships in 10 days", which gives someone time to go out and *kill* the elephant.? Those connectors are going to be there anyway. But on the flip side, if I keep using the connector I started with then it's a whole lot easier on me.
? The best bet it seems would be to use one of those Amphenol Series 26-4200 connectors mentioned They omit the alignment/polarity pins of the 4100 used in the Tek plugins.? But I note that they are about double the price of the used 16 pin 4100 male on e-bay.? ?Arg.? It costs a lot of money to be ethical! If it's ethical, where did the used connectors come from? At least, they're not in a landfill... Harvey ? Dan
On Wednesday, August 7, 2019, 01:47:06 AM EDT, ¸é±ð²Ô¨¦±ð <k6fsb.1@...> wrote:
I did something similar back in 82 after thieves stole the radio from my
320 BMW....stuff originally used was from Haltek eons ago.
I used (in fact just replaced the female 22pin card edge connector).
cinch makes others look at the data sheet/ cinch catalogue. Cardcon .156
series starts on page 2-62. have a gander lots of ideas!
Mouser #:? 538-50-44SN-1 should get you close
available in other number of pins too IFIRC? 6,10,15,18......
are not cheap, but then quality never is........
remember long after the price is forgotten the quality remains.......
¸é±ð²Ô¨¦±ð
On 2019-08-06 9:04 p.m., Daniel Koller via Groups.Io wrote:
Hi all,
? ? ?I have another slightly off topic but on topic question, again related to my car!? You can tell I've been working on and playing with my '67 Mustang convertible lately, and btw after checking it out with my scope, and other trouble shooting, I replaced the ignition coil, and it is running absolutely perfectly now.
? ? So anyway, years ago, while in high school (and now I mean 30 years ago) I built myself a custom "Benzi Box" for my radio.? It being a convertible, I didn't want the top slashed, so someone could steel the radio.? ?Using the original dashboard bezel, and some folded metal framework, I built a custom frame and "plug in" for the radios (you can tell how this is related now...).? I have two radios I can simply swap in and out.? One is a Sound Stream AM/FM cassette, the other is the original AM pushbutton radio that came with the car.? ?A third will soon be a 1970's vintage 8-track.? ?The plug-in around the radio connects to the frame in the car using a multi-pin connector to carry +12V, ground, stereo left/right? front and back, antenna power, etc.
? ? ?Now, the problem is that I used a set of connectors from a Tek 500 plug-in, as I had a few junkers at the time (and I was a bit clueless).? ?Clearly, these are a bit more valuable to me now.
? ? ?The question then, is are there any very *similar* connectors to the Amphenol blue Tek 500 plug in connectors that would serve in a similar capacity?? ?Prefereably they would be commonly available, and be a relatively simple swap for bot the male and female versions.? ?That would allow me to pull the two males and one female out of my radios and use them to fix the damaged connectors on a couple of Tek 500 plug-ins that need them.? ?And I'd have something a bit more replaceable for the radios.? ?I need at least as many pins because they are all used!
? ? Thanks for the Ideas in advance,? Dan
.
|
Tektronix plug in extenders available
Hello; I'm doing a spot of clean up and downsizing and found a couple of Tektronix plug in extenders. - 013-0055-00 Quantity 2 according to TekWiki 530, 540, 550, 580 scopes - 013-013 (new # 013-0013-00) Quantity 1, according to TekWiki 555 timing They are in mint shape, very little use. I have no idea about price, if you are interested PM me and we can go from there. I am in Canada, given the small size Canada Post for shipping will be the most economical. Thanks! Ken
|
Yes, Bob, I would go for one if you are willing to ship it for me.
AZ 86351 KO3Y
Kevin
|
Chuck Harris's advice is spot on, but the plastic collet around the motor shaft that attaches to the fan is old and very brittle, and it breaks easily. When mine broke, I ripped out motor and fan, and replaced with a Noctua NF-A6x25 FLX 12V fan ($15 from Amazon). This requires milling the back cover, and inserting a 39ohm 2W (value experimentally determined for this fan under load) resistor to drop the existing motor 15V to 12V. The wire harness that comes with the Noctua fan makes this easy (cut the yellow wire in the harness when you replace the resistor). Upside is good airflow and quiet fan. Link to pictures: /g/TekScopes/album?id=94011john - AE0AM
|
Well, if you ever want to see Maine, bring your calibration stuff and I¡¯ll give you a place to stay. I live on a lake!
larry
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On Aug 7, 2019, at 8:39 AM, satbeginner <castellcorunas@...> wrote:
Hi, I am Dutch, but I live in Spain.
|
Re: Tek 500 connectors or similar? A bit off topic!!!
Hi All,?
? Thanks for the advice.
? Yes, it appears the Amphenol connectos in the 500 series are series 26 connectors.? ?Probably the *easiest* thing for me to do is to keep using them.? ? There are used ones available on e-bay for $12.95, likely harvested from a Tek scope.? ?But this is like organ harvesting.? ?If I buy that one on e-bay, do I encourage someone to strip them out of good, working plug-ins that might otherwise get sold intact to a wanting collector?? It's like the ivory trade - I'd hate to encourage it.? But on the flip side, if I keep using the connector I started with then it's a whole lot easier on me.? ?
? The best bet it seems would be to use one of those Amphenol Series 26-4200 connectors mentioned They omit the alignment/polarity pins of the 4100 used in the Tek plugins.? But I note that they are about double the price of the used 16 pin 4100 male on e-bay.? ?Arg.? It costs a lot of money to be ethical!
? Dan
toggle quoted message
Show quoted text
On Wednesday, August 7, 2019, 01:47:06 AM EDT, ¸é±ð²Ô¨¦±ð <k6fsb.1@...> wrote: I did something similar back in 82 after thieves stole the radio from my 320 BMW....stuff originally used was from Haltek eons ago. I used (in fact just replaced the female 22pin card edge connector). cinch makes others look at the data sheet/ cinch catalogue. Cardcon .156 series starts on page 2-62. have a gander lots of ideas! Mouser #:? 538-50-44SN-1 should get you close available in other number of pins too IFIRC? 6,10,15,18...... are not cheap, but then quality never is........ remember long after the price is forgotten the quality remains....... ¸é±ð²Ô¨¦±ð On 2019-08-06 9:04 p.m., Daniel Koller via Groups.Io wrote: Hi all,
? ? ?I have another slightly off topic but on topic question, again related to my car!? You can tell I've been working on and playing with my '67 Mustang convertible lately, and btw after checking it out with my scope, and other trouble shooting, I replaced the ignition coil, and it is running absolutely perfectly now.
? ? So anyway, years ago, while in high school (and now I mean 30 years ago) I built myself a custom "Benzi Box" for my radio.? It being a convertible, I didn't want the top slashed, so someone could steel the radio.? ?Using the original dashboard bezel, and some folded metal framework, I built a custom frame and "plug in" for the radios (you can tell how this is related now...).? I have two radios I can simply swap in and out.? One is a Sound Stream AM/FM cassette, the other is the original AM pushbutton radio that came with the car.? ?A third will soon be a 1970's vintage 8-track.? ?The plug-in around the radio connects to the frame in the car using a multi-pin connector to carry +12V, ground, stereo left/right? front and back, antenna power, etc.
? ? ?Now, the problem is that I used a set of connectors from a Tek 500 plug-in, as I had a few junkers at the time (and I was a bit clueless).? ?Clearly, these are a bit more valuable to me now.
? ? ?The question then, is are there any very *similar* connectors to the Amphenol blue Tek 500 plug in connectors that would serve in a similar capacity?? ?Prefereably they would be commonly available, and be a relatively simple swap for bot the male and female versions.? ?That would allow me to pull the two males and one female out of my radios and use them to fix the damaged connectors on a couple of Tek 500 plug-ins that need them.? ?And I'd have something a bit more replaceable for the radios.? ?I need at least as many pins because they are all used!
? ? Thanks for the Ideas in advance,? Dan
.
|
Hi, I am Dutch, but I live in Spain.
|
I wish you were not in Europe (where?) as I¡¯d like to calibrate my2445B and 2465DBM.
larry
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On Aug 7, 2019, at 8:28 AM, satbeginner <castellcorunas@...> wrote:
Hi all,
since my number of 2465xx scopes is growing, and I just love to repair, restore and calibrate these, I now want to buy a SG-503 leveled generator.
Being retired my budget is not huge, and because of that, I prefer a unit being in Europe because of shipping and the import duties.
The unit does not need to work, I think these are quite 'fixable'
Thanks, looking forward to your responses,
Leo
|
Hi all,
since my number of 2465xx scopes is growing, and I just love to repair, restore and calibrate these, I now want to buy a SG-503 leveled generator.
Being retired my budget is not huge, and because of that, I prefer a unit being in Europe because of shipping and the import duties.
The unit does not need to work, I think these are quite 'fixable'
Thanks, looking forward to your responses,
Leo
|
Re: General Radio 874 Connector, inner conductor "bendies"
On 8/6/2019 5:44 PM, Roy Thistle wrote: My initial question is¡ Is that normal, or is the center conductor of the connector damaged? I would pretty much have to look at the actual connector to tell whether that is a trick of lighting or signs of damage. There are no "bendies" on the leaves of a GR-874 inner conductor, just on the outer conductor. You couldn't have anything bent outwards on the inner conductor in any case as that would cause an impedance bump in the skin effect flow of current. My initial guess is the matching, inserter GR-874, after being rotated, and mated, has damaged the insertee? GR-874 connectors are not rotated. They are inserted straight into each other and held by friction. GR later introduced locking rings to prevent accidental separation, but GR-874 connectors with or without locking rings will mate with each other. If so, how does the mated pair maintain 50 ohms? They do do by presenting smooth surfaces on the outside of the inner conductor and the inside of the outer conductor the same way that any RF connector must do to provide constant impedance. -- Dale H. Cook, GR/HP/Tek Collector, Roanoke/Lynchburg, VA
|
Re: Tek 500 connectors or similar? A bit off topic!!!
I did something similar back in 82 after thieves stole the radio from my 320 BMW....stuff originally used was from Haltek eons ago.
I used (in fact just replaced the female 22pin card edge connector). cinch makes others look at the data sheet/ cinch catalogue. Cardcon .156 series starts on page 2-62. have a gander lots of ideas!
Mouser #:? 538-50-44SN-1 should get you close
available in other number of pins too IFIRC? 6,10,15,18......
are not cheap, but then quality never is........
remember long after the price is forgotten the quality remains.......
¸é±ð²Ô¨¦±ð
toggle quoted message
Show quoted text
On 2019-08-06 9:04 p.m., Daniel Koller via Groups.Io wrote: Hi all,
? ?I have another slightly off topic but on topic question, again related to my car!? You can tell I've been working on and playing with my '67 Mustang convertible lately, and btw after checking it out with my scope, and other trouble shooting, I replaced the ignition coil, and it is running absolutely perfectly now.
? So anyway, years ago, while in high school (and now I mean 30 years ago) I built myself a custom "Benzi Box" for my radio.? It being a convertible, I didn't want the top slashed, so someone could steel the radio.? ?Using the original dashboard bezel, and some folded metal framework, I built a custom frame and "plug in" for the radios (you can tell how this is related now...).? I have two radios I can simply swap in and out.? One is a Sound Stream AM/FM cassette, the other is the original AM pushbutton radio that came with the car.? ?A third will soon be a 1970's vintage 8-track.? ?The plug-in around the radio connects to the frame in the car using a multi-pin connector to carry +12V, ground, stereo left/right? front and back, antenna power, etc.
? ?Now, the problem is that I used a set of connectors from a Tek 500 plug-in, as I had a few junkers at the time (and I was a bit clueless).? ?Clearly, these are a bit more valuable to me now.
? ?The question then, is are there any very *similar* connectors to the Amphenol blue Tek 500 plug in connectors that would serve in a similar capacity?? ?Prefereably they would be commonly available, and be a relatively simple swap for bot the male and female versions.? ?That would allow me to pull the two males and one female out of my radios and use them to fix the damaged connectors on a couple of Tek 500 plug-ins that need them.? ?And I'd have something a bit more replaceable for the radios.? ?I need at least as many pins because they are all used!
? Thanks for the Ideas in advance,? Dan
.
|
Re: O.T. question on MoVs
Yes, and sometimes the fake markings are better than the real parts.? Back in the late nineties a company I was working for bought a mixed lot of HEXFETS (as I recall) that we desperately needed from a sketchy source, and some started failing.? We discovered that the parts that were failing were laser marked, while the genuine parts were painted.? ?In 2000 at another company, we found a batch of fake AVX or Kemet Ta caps.? They were marked the same way as the real parts but looked much better.? The kicker was that they came from an A list Disty.
You have to buy from legit sources, and even then be watchful.
-Dave
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On Tuesday, August 6, 2019, 05:26:54 PM PDT, Mark Goldberg <marklgoldberg@...> wrote:
I am not sure how to test them non-destructively. I only buy parts from
real distributors, so you know what you are getting. Much of the stuff from
Amazon / Aliexpess / Ebay, especially from international sources is
counterfeit or bad. Markings don't mean anything either as they paint those
on fakes too.
Regards,
Mark
|
Re: General Radio 874 Connector, inner conductor "bendies"
FWIW a description of the 874 appeared in the General Radio Experimenter
The patent appears at:
This has a fairly detailed drawing.
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On 8/6/2019 3:24 PM, Richard Knoppow wrote: ??? I looked at a couple of 874 s just now.
--
Richard Knoppow
dickburk@...
WB6KBL
|
Re: Tek 500 connectors or similar? A bit off topic!!!
Further to this- I think the ones Tek used are the 26-4100 series-the ones I have that are slightly different are the 26-4200 series.
DaveB, NZ
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-----Original Message----- From: [email protected] [mailto: [email protected]] On Behalf Of Dave Brown Sent: Wednesday, August 07, 2019 16:34 To: [email protected]Subject: Re: [TekScopes] Tek 500 connectors or similar? A bit off topic!!! Yes and yes. Amphenol make 'em. Probably others as well? A local R/T manufacturer (Tait Electronics) used the red range a lot in their early VHF product so the radio could be just unplugged from the permanently mounted cradle(sound familiar!) They changed to a different connector with a coax insert when they went to 460 MHz gear as the impedance bump in the antenna lead thru the red range jobs was a bit much for up there. There's a blue range as well- sorry can't recall what they are called just now but they are fairly common. Lots of 16 way here (ex eqpt) if you cant find any. DaveB, NZ -----Original Message----- From: [email protected] [mailto: [email protected]] On Behalf Of Daniel Koller via Groups.Io Sent: Wednesday, August 07, 2019 16:04 To: TekScopes Subject: [TekScopes] Tek 500 connectors or similar? A bit off topic!!! Hi all, I have another slightly off topic but on topic question, again related to my car! You can tell I've been working on and playing with my '67 Mustang convertible lately, and btw after checking it out with my scope, and other trouble shooting, I replaced the ignition coil, and it is running absolutely perfectly now. So anyway, years ago, while in high school (and now I mean 30 years ago) I built myself a custom "Benzi Box" for my radio. It being a convertible, I didn't want the top slashed, so someone could steel the radio. Using the original dashboard bezel, and some folded metal framework, I built a custom frame and "plug in" for the radios (you can tell how this is related now...). I have two radios I can simply swap in and out. One is a Sound Stream AM/FM cassette, the other is the original AM pushbutton radio that came with the car. A third will soon be a 1970's vintage 8-track. The plug-in around the radio connects to the frame in the car using a multi-pin connector to carry +12V, ground, stereo left/right front and back, antenna power, etc. Now, the problem is that I used a set of connectors from a Tek 500 plug-in, as I had a few junkers at the time (and I was a bit clueless). Clearly, these are a bit more valuable to me now. The question then, is are there any very *similar* connectors to the Amphenol blue Tek 500 plug in connectors that would serve in a similar capacity? Prefereably they would be commonly available, and be a relatively simple swap for bot the male and female versions. That would allow me to pull the two males and one female out of my radios and use them to fix the damaged connectors on a couple of Tek 500 plug-ins that need them. And I'd have something a bit more replaceable for the radios. I need at least as many pins because they are all used! Thanks for the Ideas in advance, Dan
|
Re: Tek 500 connectors or similar? A bit off topic!!!
On 8/7/2019 12:04 AM, Daniel Koller via Groups.Io wrote: Hi all,
? ?I have another slightly off topic but on topic question, again related to my car!? You can tell I've been working on and playing with my '67 Mustang convertible lately, and btw after checking it out with my scope, and other trouble shooting, I replaced the ignition coil, and it is running absolutely perfectly now.
? So anyway, years ago, while in high school (and now I mean 30 years ago) I built myself a custom "Benzi Box" for my radio.? It being a convertible, I didn't want the top slashed, so someone could steel the radio.? ?Using the original dashboard bezel, and some folded metal framework, I built a custom frame and "plug in" for the radios (you can tell how this is related now...).? I have two radios I can simply swap in and out.? One is a Sound Stream AM/FM cassette, the other is the original AM pushbutton radio that came with the car.? ?A third will soon be a 1970's vintage 8-track.? ?The plug-in around the radio connects to the frame in the car using a multi-pin connector to carry +12V, ground, stereo left/right? front and back, antenna power, etc.
? ?Now, the problem is that I used a set of connectors from a Tek 500 plug-in, as I had a few junkers at the time (and I was a bit clueless).? ?Clearly, these are a bit more valuable to me now.
? ?The question then, is are there any very *similar* connectors to the Amphenol blue Tek 500 plug in connectors that would serve in a similar capacity?? ?Prefereably they would be commonly available, and be a relatively simple swap for bot the male and female versions.? ?That would allow me to pull the two males and one female out of my radios and use them to fix the damaged connectors on a couple of Tek 500 plug-ins that need them.? ?And I'd have something a bit more replaceable for the radios.? ?I need at least as many pins because they are all used! IIRC, these are amphenol blue ribbon connectors.? You might want to consider centronics style connectors, which may work.? BTW: I think that old HP equipment used them too, so depending on the age of the equipment, a check on the HP list may help. A short check of Mouser didn't show any in the catalog. Harvey
? Thanks for the Ideas in advance,? Dan
|
Re: Tek 500 connectors or similar? A bit off topic!!!
Yes and yes. Amphenol make 'em. Probably others as well? A local R/T manufacturer (Tait Electronics) used the red range a lot in their early VHF product so the radio could be just unplugged from the permanently mounted cradle(sound familiar!) They changed to a different connector with a coax insert when they went to 460 MHz gear as the impedance bump in the antenna lead thru the red range jobs was a bit much for up there.
There's a blue range as well- sorry can't recall what they are called just now but they are fairly common. Lots of 16 way here (ex eqpt) if you cant find any.
DaveB, NZ
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-----Original Message----- From: [email protected] [mailto: [email protected]] On Behalf Of Daniel Koller via Groups.Io Sent: Wednesday, August 07, 2019 16:04 To: TekScopes Subject: [TekScopes] Tek 500 connectors or similar? A bit off topic!!! Hi all, I have another slightly off topic but on topic question, again related to my car! You can tell I've been working on and playing with my '67 Mustang convertible lately, and btw after checking it out with my scope, and other trouble shooting, I replaced the ignition coil, and it is running absolutely perfectly now. So anyway, years ago, while in high school (and now I mean 30 years ago) I built myself a custom "Benzi Box" for my radio. It being a convertible, I didn't want the top slashed, so someone could steel the radio. Using the original dashboard bezel, and some folded metal framework, I built a custom frame and "plug in" for the radios (you can tell how this is related now...). I have two radios I can simply swap in and out. One is a Sound Stream AM/FM cassette, the other is the original AM pushbutton radio that came with the car. A third will soon be a 1970's vintage 8-track. The plug-in around the radio connects to the frame in the car using a multi-pin connector to carry +12V, ground, stereo left/right front and back, antenna power, etc. Now, the problem is that I used a set of connectors from a Tek 500 plug-in, as I had a few junkers at the time (and I was a bit clueless). Clearly, these are a bit more valuable to me now. The question then, is are there any very *similar* connectors to the Amphenol blue Tek 500 plug in connectors that would serve in a similar capacity? Prefereably they would be commonly available, and be a relatively simple swap for bot the male and female versions. That would allow me to pull the two males and one female out of my radios and use them to fix the damaged connectors on a couple of Tek 500 plug-ins that need them. And I'd have something a bit more replaceable for the radios. I need at least as many pins because they are all used! Thanks for the Ideas in advance, Dan
|
Re: Tek 500 connectors or similar? A bit off topic!!!
On 8/6/19 11:04 PM, Daniel Koller via Groups.Io wrote: are there any very*similar* connectors to the Amphenol blue Tek 500 plug in connectors that would serve in a similar capacity?? ?Prefereably they would be commonly available, and be a relatively simple swap for bot the male and female versions.? ?That would allow me to pull the two males and one female out of my radios and use them to fix the damaged connectors on a couple of Tek 500 plug-ins that need them. Cinch card edge connectors with 0.156 or so spacing? I have some of those in widths like 8 10 12 pairs of contacts. Can you rig a card edge to stick out of your racks/boxes?
|
John Bennett
satbeginner
Dale H. Cook