Re: Series 1 & 2 boxes (was Seeking Spring Nuts for Series 1 cabinet)
Hi Dave!
Series One is the 200C, etc, series of rounded corner cabinets that housed Rack mount instruments. The 340 Noise figure meter is an example that comes to mind: A puce cabinet that is held in place by 2 set crews under the front edge that allows the cabinet to slip off and reveal a 19 inch rack panel inside, ready to bolt up. There were smaller instruments like the 200 CD, the 428A clip-on ammeter, 425A DC Microvoltmeter. Othe cases were the 608A-F Sig Gen, 606A/B sig gen, etc.
The series 2 were cases like the 432A power meter and the 8640B sig gen, 8690 sweeper, 141T Spec An, etc. These used the cast aluminum side rails.
Regards,
Jeff
In a message dated 4/21/2020 1:01:13 PM Eastern Standard Time, david_wise@... writes:
??Thank you, Jeff! ?I only need two. ?I'll send you my address off-list.
?
Now I'm confused. ?If I'm Series 2 (cast Al sides), then what was Series 1? ?Is there a cheat sheet, or representative example models?
?
Thanks,
Dave Wise
I have a stash from scrapping HP stuff. How many do you need? Also isnt the 740 a series 2 cabinet? With the cast Aluminum side rails, etc?
Jeff
In a message dated 4/21/2020 11:49:16 AM Eastern Standard Time, david_wise@... writes:
The top and bottom covers of the 740B are secured by screws which go through 6-32 J-style?spring nuts clipped onto the side panels. ?Except I'm missing some of them. ?The manual doesn't mention them.
?
These particular?spring nuts (speed?nuts, clip nuts, Tinnerman nuts, J-nuts, U-nuts)?seem to be obsolete or custom-made; I can't find anything to match.
?
The sticking point is the?1/8-inch panel depth.
?
All I can find?are for a 1/16-inch?panel.
?
Got any leads?
?
Thanks,
Dave Wise
?
PS: I think U-style would work as well as J-style.
|
I'm not an avid book reader but I have read "Soul of a New Machine" (twice as I recall) and I found that book fascinating and kept my attention throughout. Those guys worked so hard on that project. I'll bet that even though the hours were unbelievably long, there was a spirit of commitment to get that product out the door that I'd guess is missing in most workplaces nowadays.
Thanks,
Barry - N4BUQ
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----- Original Message ----- From: "Greg Muir via groups.io" <big_sky_explorer@...>
To: [email protected]
Sent: Tuesday, April 21, 2020 1:01:18 PM
Subject: Re: [HP-Agilent-Keysight-equipment] Book on Hp
I also recommend the following:
¡°The HP Way: How Bill Hewlett and I Built Our Company¡± by David Packard
ISBN 978-0-06-084579-7
¡°Bill & Dave¡¯s Memos: A Collection of Bill Hewlett & Dave Packard¡¯s Writings¡±
edited by Albert Yuen
ISBN 978-1-4243-2781-2
There was also a book published years ago titled ¡°The Soul of a New Machine¡±
by Tracy Kidder back in 1981 (reprinted in 2000 under ISBN
978-0-3164-9197-6) not related to HP but is a very absorbing book about how
development of an electronic product nearly became a living entity in the
eyes of the designers as it went through the design process. I highly
recommend it as well.
Nowadays companies are in the eyes of management simply something to acquire
to make their company bigger and to reap more profits. Except for the tiny
entrepreneur the average company no longer has time for management to feel
like what they put into their products is part of their own being to give
the best to customers. This was borne out by the theft of the HP name to put
on cheap jelly bean products of which today¡¯s customers are clueless about
the actual corporation and founders who put their entire lives into making
that name so famous from the quality products that they offered.? In those
days living customers were the focus, not the money that they offered.? The
money was somewhat of a form of congratulation to tell Bill and Dave that
they did a successful job and to promote more excellent products to be
offered in the future.
When I talk to Agilent/Keysight/whatever sales people & engineers I still use
the HP name which either draws puzzled looks or pointed comments that the
company is ¡°NOW KEYSIGHT!!¡± Yes, but where did this now-funny-named company
originate?
Greg
|
I also recommend the following:
?
¡°The HP Way: How Bill Hewlett and I Built Our Company¡± by David Packard
ISBN 978-0-06-084579-7
?
¡°Bill & Dave¡¯s Memos: A Collection of Bill Hewlett & Dave Packard¡¯s Writings¡± edited by Albert Yuen
ISBN 978-1-4243-2781-2
?
There was also a book published years ago titled ¡°The Soul of a New Machine¡± by Tracy Kidder back in 1981 (reprinted in 2000 under ISBN 978-0-3164-9197-6) not related to HP but is a very absorbing book about how development of an electronic product nearly became a living entity in the eyes of the designers as it went through the design process.? I highly recommend it as well.
?
Nowadays companies are in the eyes of management simply something to acquire to make their company bigger and to reap more profits.? Except for the tiny entrepreneur the average company no longer has time for management to feel like what they put into their products is part of their own being to give the best to customers.? This was borne out by the theft of the HP name to put on cheap jelly bean products of which today¡¯s customers are clueless about the actual corporation and founders who put their entire lives into making that name so famous from the quality products that they offered.? In those days living customers were the focus, not the money that they offered.? The money was somewhat of a form of congratulation to tell Bill and Dave that they did a successful job and to promote more excellent products to be offered in the future.
?
When I talk to Agilent/Keysight/whatever sales people & engineers I still use the HP name which either draws puzzled looks or pointed comments that the company is ¡°NOW KEYSIGHT!!¡± Yes, but where did this now-funny-named company originate?
?
Greg
|
Re: Seeking Spring Nuts for Series 1 cabinet
??Thank you, Jeff! ?I only need two. ?I'll send you my address off-list.
Now I'm confused. ?If I'm Series 2 (cast Al sides), then what was Series 1? ?Is there a cheat sheet, or representative example models?
Thanks,
Dave Wise
toggle quoted message
Show quoted text
I have a stash from scrapping HP stuff. How many do you need? Also isnt the 740 a series 2 cabinet? With the cast Aluminum side rails, etc?
Jeff
In a message dated 4/21/2020 11:49:16 AM Eastern Standard Time, david_wise@... writes:
The top and bottom covers of the 740B are secured by screws which go through 6-32 J-style?spring nuts clipped onto the side panels. ?Except I'm missing some of them. ?The manual doesn't mention them.
?
These particular?spring nuts (speed?nuts, clip nuts, Tinnerman nuts, J-nuts, U-nuts)?seem to be obsolete or custom-made; I can't find anything to
match.
?
The sticking point is the?1/8-inch panel depth.
?
All I can find?are for a 1/16-inch?panel.
?
Got any leads?
?
Thanks,
Dave Wise
?
PS: I think U-style would work as well as J-style.
|
Re: Seeking Spring Nuts for Series 1 cabinet
??No joy there either. ?McMaster does have one "clip-on nut" for number 6 sheet metal screw and 1/8-inch panel but the throat depth (from bend to hole) is about twice the 3/16-inch I require. ?Fastenal has one "U-type spring nut" but it's?0.040-inch panel
and everything else is thousand-dollar minimum?quantity. ?It was the same frustrating story everywhere I looked. ?Either no info, didn't meet spec, or out-of-reach price.
Jeff Kruth comes to the rescue up-thread with a personal stash. ?Thanks, Jeff!
Dave Wise
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Greetings,
How about McMaster Carr or Fastenal?
Worth a shot.
Good hunting!
Ken
The top and bottom covers of the 740B are secured by screws which go through 6-32 J-style?spring nuts clipped onto the side panels. ?Except I'm missing some of them. ?The manual doesn't mention them.
These particular?spring?nuts (speed?nuts, clip nuts, Tinnerman nuts, J-nuts, U-nuts)?seem
to be obsolete or custom-made; I can't find anything to match.
The sticking point is the?1/8-inch panel depth.
All I can find?are for a 1/16-inch?panel.
Got any leads?
Thanks,
Dave Wise
PS: I think U-style would work as well as J-style.
|
Re: Seeking Spring Nuts for Series 1 cabinet
I have a stash from scrapping HP stuff. How many do you need? Also isnt the 740 a series 2 cabinet? With the cast Aluminum side rails, etc?
Jeff
In a message dated 4/21/2020 11:49:16 AM Eastern Standard Time, david_wise@... writes:
The top and bottom covers of the 740B are secured by screws which go through 6-32 J-style?spring nuts clipped onto the side panels. ?Except I'm missing some of them. ?The manual doesn't mention them.
?
These particular?spring nuts (speed?nuts, clip nuts, Tinnerman nuts, J-nuts, U-nuts)?seem to be obsolete or custom-made; I can't find anything to match.
?
The sticking point is the?1/8-inch panel depth.
?
All I can find?are for a 1/16-inch?panel.
?
Got any leads?
?
Thanks,
Dave Wise
?
PS: I think U-style would work as well as J-style.
|
|
|
Re: HP K21-5321B Digital Clock
Philipp, ? What is the clock doing/not doing.? I went looking for our manuals and it seems they did not survive the purge. ? One thing to do as a preventative measure is to look at the row of chips next to the NIXIE tubes.? In between them (I think I¡¯ve got the position right) are resistors.? These are the current limit resistors for the NIXIEs and they get hot enough to burn the board.? We always replace them, installing about a 0.25 in above the PCA.? ? The circuit for this part is very similar to the display section of the 5327B.? ? We built a replacement clock that actually remembers who it is when the power is cycled so all of the old stuff got packed. ? I¡¯ll talk to my partner but I can¡¯t find the spare boards of manuals we used to have ? Steve ?
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From: [email protected] < [email protected]> On Behalf Of Philipp G Sent: Tuesday, April 21, 2020 1:57 AM To: [email protected]Subject: [HP-Agilent-Keysight-equipment] HP K21-5321B Digital Clock ? Hello,
maybe anybody has a service Manual f¨¹r the K21-5321B Digital Clock.
My clock dosent work the right way. I already tryed swaping ICs but i think that more than one is faulty...
Best regards from Germany
Philipp Gr?mer
|
Re: new File called App notes
First place to look is the PSU caps as always...
Nigel Adams - Marconi Instruments Heritage Collection
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-----Original Message----- From: [email protected] < [email protected]> On Behalf Of Dave Wise Sent: 21 April 2020 17:34 To: [email protected]Subject: Re: [HP-Agilent-Keysight-equipment] new File called App notes My 400EL (S/N prefix 949) has succumbed to meter scale rot, but I hooked an analog DC voltmeter to the DC OUTPUT banana jacks on the rear panel. It reads 29mV +/- 1mV of jitter. It drops 1mV when I turn off the overhead fluorescent lights, and 1mV when I put a metal cover over the BNC. This translates into about 3% of scale with barely perceptible jitter on the 400E, and far below scale on the 400EL. To my surprise, I didn't see a noise spec in the manual, but what I observed doesn't sound out of line. I think your instrument is troubled, Jim. Dave Wise ________________________________________ From: [email protected] < [email protected]> on behalf of Jim Ford via groups.io <james.ford@...> Sent: Monday, April 20, 2020 8:38 PM To: [email protected]Subject: Re: [HP-Agilent-Keysight-equipment] new File called App notes Me, too. I have a 400E and just checked it after not having used it for some time. On the most sensitive range, -60 dB 0.001 V, the needle moves around a fair amount with open input BNC, and if that could be stopped, that would be great. Or is there something else wrong with mine? Thanks. Jim Ford
|
Re: new File called App notes
My 400EL (S/N prefix 949) has succumbed to meter scale rot, but I hooked an analog DC voltmeter to the DC OUTPUT banana jacks on the rear panel. It reads 29mV +/- 1mV of jitter. It drops 1mV when I turn off the overhead fluorescent lights, and 1mV when I put a metal cover over the BNC. This translates into about 3% of scale with barely perceptible jitter on the 400E, and far below scale on the 400EL. To my surprise, I didn't see a noise spec in the manual, but what I observed doesn't sound out of line. I think your instrument is troubled, Jim. Dave Wise ________________________________________ From: [email protected] < [email protected]> on behalf of Jim Ford via groups.io <james.ford@...> Sent: Monday, April 20, 2020 8:38 PM To: [email protected]Subject: Re: [HP-Agilent-Keysight-equipment] new File called App notes Me, too. I have a 400E and just checked it after not having used it for some time. On the most sensitive range, -60 dB 0.001 V, the needle moves around a fair amount with open input BNC, and if that could be stopped, that would be great. Or is there something else wrong with mine? Thanks. Jim Ford
|
Re: HP8562A Errors 304,335,317,333
I assume that the C301 is connected to the top of the transformer that the lower CR304 is connected.? They are coupling some of the AC from the transformer up to CR301/CR302. I don¡¯t work on doublers very much but that¡¯s what the diode configuration would suggest.? I¡¯m not sure what the +28 is used for but it won¡¯t be very much current and C301 being wonky will keep this circuit from working. ? Steve ?
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From: [email protected] < [email protected]> On Behalf Of Peter Hansen Sent: Tuesday, April 21, 2020 7:59 AM To: [email protected]Subject: Re: [HP-Agilent-Keysight-equipment] HP8562A Errors 304,335,317,333 ? hello i think it is to galvanize isolate that supply. But it is exact the cap. I bet it is open. just use a 220uf i do that all the time to bring it back. let me know once you tried
Peter, ? Have a 2nd PSU to remove and use as Test components. One quick question? ? What type of PSU is this never seen this type of config before! ? 
? ? There is no physical connectivity to the Diodes CR301/302 only the decoupling cap C301(Suggested being faulty). Is this a voltage doubling circuit , not sure? ? Cheers, Stu. ? ? Hello It can work stand alone. I have had failures in the PSU in a 180uF capacitor. It was a blue one. It was open and leaked alittle. If you need i Can find a psu and point to it. The cap was open and the 28v was absent. PSU is taken out from the top side all 4 pcb must be folded out and below the alu cover is the PSU.
Would Like to say Good news but? ? Managed to get the Analyser on the bench today for a quick check and looks as if 28Volts not there. ? Also getting that smell of Burning rubber so worried could be causing more damage and need to isolate the source and start diagnosing supply. ? Can the PSU work standalone, or is it load conscious? ? Stu. ? ? ? ? ? hello Stu if you look on A2 on the side you see the LEDs for the PSU. All should be LIT. I am sure this is not a PSU issue. If you work through the 300/600Mhz chain with an osilloscope you can check where the signal dissapears. I remember the 600Mhz is made in a doubler and if signal is too small you have not enough for doubling to 600Mhz.
Peter, ? Ok from schematic I can see the 600MHz Oscillator ¨¤ Buffer ¨¤ /2 = 300Mhz ¨¤ Offset Loop Buffer. Is that correct? Is it the /2 device your talking about? The whole board seems to be a 600Mhz PLL with 10Mhz ref at source. Correct me if I¡¯m wrong. ? I still think something burn¡¯t out although th PSU looks clean. Just prepping up before getting My hands dirty.. ? Stu. ? ? Hello Stu I must correct my self. The 8562A is before use og MMIC. area is still the same. It is just discrete amplifiers. Order a schematics from Artic media ant look for Radio Frequency module look in the page with the generation of 300/600Mhz. Reason why you can?t measure anything is because the 600Mhz is used for third mixer.
Peter, ? Which board are we talking about ? Still looking for the LED PSU indicators on the A2 card. ? Presume you are referring RF board..? Is this an off the shelf part or HP proprietary? ? Thanks, ? Stu. ? ? Hello Group a TAM is not needed in this case. It is simply a MMIC in the 300/600Mhz chain that is bad. I believe Harke has a Hp85629A TAM for sale. best regards Peter Hansen
I suspect you might be able to rent the TAM from one of the ETE rental outfits for a month or so for not a horrible price.? I believe that Tam Hanna has one or two for sale, I may purchase one from him for my own use with my 8562A.
Don Bitters
|
Greetings,
It IS a fantastic book. ?I have read and reread it.
I have also given several copies away - not just for historical reasons but to show managers how it is possible to create a great company and great working environment.
I am saddened to say that I doubt there will ever be another company like HP was when Mr. Hewlett and Mr. Packard were at the helm.
Regards,
Ken
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On 21Apr, 2020, at 12:28 AM, John Lyles < jtml@...> wrote:
This is an excellent book on the culture of the company when Bill and Dave ran it.
<Bill and Dave book.jpg>
|
Re: Seeking Spring Nuts for Series 1 cabinet
The ones McMac lists are not designed to be used on 1/8" thick panels, but for thinner sheet metal.? I too would like to find a source for spares, so I'm following this as well. -Pat
On April 21, 2020 at 12:15 PM ken chalfant <kpchalfant@...> wrote:
Greetings,
How about McMaster Carr or Fastenal?
Worth a shot.
Good hunting!
Ken
The top and bottom covers of the 740B are secured by screws which go through 6-32 J-style?spring nuts clipped onto the side panels. ?Except I'm missing some of them. ?The manual doesn't mention them.
These particular? spring ?nuts (speed?nuts, clip nuts, Tinnerman nuts, J-nuts, U-nuts)?seem to be obsolete or custom-made; I can't find anything to match.
The sticking point is the?1/8-inch panel depth.
All I can find?are for a 1/16-inch?panel.
Got any leads?
Thanks,
Dave Wise
PS: I think U-style would work as well as J-style.
?
?
|
Re: Seeking Spring Nuts for Series 1 cabinet
Greetings,
How about McMaster Carr or Fastenal?
Worth a shot.
Good hunting!
Ken
toggle quoted message
Show quoted text
The top and bottom covers of the 740B are secured by screws which go through 6-32 J-style?spring nuts clipped onto the side panels. ?Except I'm missing some of them. ?The manual doesn't mention them.
These particular?spring?nuts (speed?nuts, clip nuts, Tinnerman nuts, J-nuts, U-nuts)?seem to be obsolete or custom-made; I can't find anything to match.
The sticking point is the?1/8-inch panel depth.
All I can find?are for a 1/16-inch?panel.
Got any leads?
Thanks,
Dave Wise
PS: I think U-style would work as well as J-style.
|
Seeking Spring Nuts for Series 1 cabinet
The top and bottom covers of the 740B are secured by screws which go through 6-32 J-style?spring nuts clipped onto the side panels. ?Except I'm missing some of them. ?The manual doesn't mention them.
These particular?spring nuts (speed?nuts, clip nuts, Tinnerman nuts, J-nuts, U-nuts)?seem to be obsolete or custom-made; I can't
find anything to match.
The sticking point is the?1/8-inch panel depth.
All I can find?are for a 1/16-inch?panel.
Got any leads?
Thanks,
Dave Wise
PS: I think U-style would work as well as J-style.
|
Re: Problem with HP MMS 70000, USERLOCK ON
Hi JF,
I could USERLOCK OFF with my HP computer using your method.
I've tried to load again the 70875A DLP loaded into my 70900B and
faced out to the same USERLOCK ON !
I guess the program is corrupted (ERR2001), tomorrow I'll try to
reload it with my original personality module.
May be due to the 70900B battery which could be out of gas .
Will see.
Thanks again
Pierre-Fran?ois, F5BQP
?
Le 21/04/2020 ¨¤ 13:37, jfphp via
groups.io a ¨¦crit?:
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Show quoted text
Programing manual 70900-90284 p. 2.550
Check HPIB address of the 70900A/B !
On Tuesday, April 21, 2020, 11:11:02 AM GMT+2,
Pierre-Fran?ois (f5bqp_pfm) <pfmonet@...>
wrote:
Hi Paul,
I would like to reset my analyser as I'm into a
deadlock within the DLP sequence and I cannot do
anything to exit.
Even the Preset Instrument button (green button) shows
me the message USERLOCK ON when I press it.
pf
Le 21/04/2020
¨¤ 10:56, Paul Bicknell a ¨¦crit?:
Hi Pierre-Fran?ois
?
Are you
actually going to send commands to the? analyser
if so why
?
I can see
the need to do screen dumps to a computer? also?
dater streams of the displayed information
?
Paul
?
Ok
fine JF, but how to proceed when you have
connected a computer to the HPIB ??
How to send the command ?
73's
pf
Le 20/04/2020 ¨¤ 23:19, jfphp via
groups.io a ¨¦crit?:
On Monday, April 20, 2020, 08:55:34
PM GMT+2, Pierre-Fran?ois (f5bqp_pfm) <pfmonet@...>
wrote:
Hello,
After a long period of non use of my MMS
70k I decided to use it again to measure
some NF with the 70875A DLP software.
A new calibration of the spectrum was
done OK.
I loaded the 70875A DLP software and
after some manipulation I realized I
could not use anymore the software.
Don't know what I did but impossible to
return to the spectrum functionalities.
When I try to preset the instrument
(green button) or the Menu function I
got USERLOCK ON and impossible anymore
to use the instrument.
How to go to the USERLOCK OFF back again
and/or to reset the instrument?
I'm really stucked on this situation
with the impossibility to use it again.
Thanks for your help.
--
Pierre-Fran?ois, F5BQP
JN18AN
?
No virus found in
this message.
Checked by AVG -
Version: 2016.0.8048 / Virus Database: 4793/15886 -
Release Date: 08/14/18
Internal Virus Database is out of date.
--
Pierre-Fran?ois, F5BQP
JN18AN
--
Pierre-Fran?ois, F5BQP
JN18AN
--
Pierre-Fran?ois, F5BQP
JN18AN
|
HP8562A Errors 304,335,317,333
Stu:
>There is no physical connectivity to the Diodes CR301/302? >only the decoupling cap C301(Suggested being faulty).
C301 is not a decoupling capacitor.
It connects 50/60 Hz AC from the secondary winding to rectifiers CR301/302.
>Is this a voltage doubling circuit , not sure?
Yes. ----------
Best regards,
Goran Finnberg
The Mastering Room AB
Goteborg
Sweden
E-mail: mastering@...
Learn from the mistakes of others, you can never live long enough to
make them all yourself.??? -?? John Luther
(\__/)
(='.'=)
(")_(") Aron, VovVov, Nero & Smurfen:RIP
|
Re: HP 400x AC voltmeter low-noise mods - was: new File called App notes
On 4/20/20 9:24 PM, Bill Perkins wrote: ?The BNC retrofit is a complete no brainer, complicated only by the need for a ground-isolated BNC readily available from Kings Another way to get to coax from banana jacks is to use the rare GR shrouded shielded double banana connector/cables -- if you can get them... They were supplied with some bridges for detector and generator connections. Searching for those words yields nothing today...
|
Re: HP8562A Errors 304,335,317,333
hello i think it is to galvanize isolate that supply. But it is exact the cap. I bet it is open. just use a 220uf i do that all the time to bring it back.
let me know once you tried
best regards Peter
Peter,
?
Have a 2nd PSU to remove and use as Test components.
One quick question?
?
What type of PSU is this never seen this type of config before!
?
?
?
There is no physical connectivity to the Diodes CR301/302 only the decoupling cap C301(Suggested being faulty).
Is this a voltage doubling circuit , not sure?
?
Cheers,
Stu.
?
toggle quoted message
Show quoted text
From: [email protected] <[email protected]>
On Behalf Of Peter Hansen
Sent: 17 April 2020 21:35
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP8562A Errors 304,335,317,333
?
Hello It can work stand alone. I have had failures in the PSU in a 180uF capacitor. It was a blue one. It was open and leaked alittle. If you need i Can find a psu and point to it. The cap was open and the 28v was
absent.
PSU is taken out from the top side all 4 pcb must be folded out and below the alu cover is the PSU.
Would Like to say Good news but?
?
Managed to get the Analyser on the bench today for a quick check and looks as if 28Volts not there.
?
Also getting that smell of Burning rubber so worried could be causing more damage and need to isolate the source and start diagnosing supply.
?
Can the PSU work standalone, or is it load conscious?
?
Stu.
?
?
?
?
?
hello Stu if you look on A2 on the side you see the LEDs for the PSU. All should be LIT. I am sure this is not a PSU issue.
If you work through the 300/600Mhz chain with an osilloscope you can check where the signal dissapears. I remember the 600Mhz is made in a doubler and if signal is too small you have not enough for doubling to 600Mhz.
Peter,
?
Ok from schematic I can see the 600MHz Oscillator
¨¤ Buffer ¨¤ /2 = 300Mhz
¨¤ Offset Loop Buffer. Is that correct?
Is it the /2 device your talking about? The whole board seems to be a 600Mhz PLL with 10Mhz ref at source.
Correct me if I¡¯m wrong.
?
I still think something burn¡¯t out although th PSU looks clean.
Just prepping up before getting My hands dirty..
?
Stu.
?
?
Hello Stu I must correct my self. The 8562A is before use og MMIC. area is still the same. It is just discrete amplifiers. Order a schematics from Artic media ant look for Radio Frequency module look in the page with
the generation of 300/600Mhz.
Reason why you can?t measure anything is because the 600Mhz is used for third mixer.
Peter,
?
Which board are we talking about ?
Still looking for the LED PSU indicators on the A2 card.
?
Presume you are referring RF board..?
Is this an off the shelf part or HP proprietary?
?
Thanks,
?
Stu.
?
?
Hello Group a TAM is not needed in this case. It is simply a MMIC in the 300/600Mhz chain that is bad.
I believe Harke has a Hp85629A TAM for sale.
best regards Peter Hansen
I suspect you might be able to rent the TAM from one of the ETE rental outfits for a month or so for not a horrible price.? I believe that Tam Hanna has one or two for sale, I may purchase one from him for my own use with my 8562A.
Don Bitters
|
Re: HP8562A Errors 304,335,317,333
Peter, ? Have a 2nd PSU to remove and use as Test components. One quick question? ? What type of PSU is this never seen this type of config before! ? 
? ? There is no physical connectivity to the Diodes CR301/302 only the decoupling cap C301(Suggested being faulty). Is this a voltage doubling circuit , not sure? ? Cheers, Stu. ?
toggle quoted message
Show quoted text
From: [email protected] <[email protected]> On Behalf Of Peter Hansen
Sent: 17 April 2020 21:35
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP8562A Errors 304,335,317,333? Hello It can work stand alone. I have had failures in the PSU in a 180uF capacitor. It was a blue one. It was open and leaked alittle. If you need i Can find a psu and point to it. The cap was open and the 28v was absent. PSU is taken out from the top side all 4 pcb must be folded out and below the alu cover is the PSU.
Would Like to say Good news but? ? Managed to get the Analyser on the bench today for a quick check and looks as if 28Volts not there. ? Also getting that smell of Burning rubber so worried could be causing more damage and need to isolate the source and start diagnosing supply. ? Can the PSU work standalone, or is it load conscious? ? Stu. ? ? ? ? ? hello Stu if you look on A2 on the side you see the LEDs for the PSU. All should be LIT. I am sure this is not a PSU issue. If you work through the 300/600Mhz chain with an osilloscope you can check where the signal dissapears. I remember the 600Mhz is made in a doubler and if signal is too small you have not enough for doubling to 600Mhz.
Peter, ? Ok from schematic I can see the 600MHz Oscillator ¨¤ Buffer ¨¤ /2 = 300Mhz ¨¤ Offset Loop Buffer. Is that correct? Is it the /2 device your talking about? The whole board seems to be a 600Mhz PLL with 10Mhz ref at source. Correct me if I¡¯m wrong. ? I still think something burn¡¯t out although th PSU looks clean. Just prepping up before getting My hands dirty.. ? Stu. ? ? Hello Stu I must correct my self. The 8562A is before use og MMIC. area is still the same. It is just discrete amplifiers. Order a schematics from Artic media ant look for Radio Frequency module look in the page with the generation of 300/600Mhz. Reason why you can?t measure anything is because the 600Mhz is used for third mixer.
Peter, ? Which board are we talking about ? Still looking for the LED PSU indicators on the A2 card. ? Presume you are referring RF board..? Is this an off the shelf part or HP proprietary? ? Thanks, ? Stu. ? ? Hello Group a TAM is not needed in this case. It is simply a MMIC in the 300/600Mhz chain that is bad. I believe Harke has a Hp85629A TAM for sale. best regards Peter Hansen
I suspect you might be able to rent the TAM from one of the ETE rental outfits for a month or so for not a horrible price.? I believe that Tam Hanna has one or two for sale, I may purchase one from him for my own use with my 8562A.
Don Bitters
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Cubdriver
Pierre-Fran?ois (f5bqp_pfm)
