HPAK 3D model repository?
I recently went looking - without any success - for a 3D model of a HP power button cap.? It may well be my Google-fu is off today but I really couldn't find any HP parts to speak of. Does anyone know of a collection of designs - buttons, feet, etc. - for HPAK equipment?? Tektronix and others for that matter...
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Hal
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OT: Re: Can someone rate the HP 8360 83630 etc. as a repair project?
KO4BB needs to replace his sites security certificate.
The current one was short lived in 2018!
Dave 'KBV.
--
Created on and sent from a Unix like PC running and using open source software:
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The first thing that comes to mind for me is something like "did the environment/temperature change, triggering a marginal component in the PSU to no longer work properly?"
Wilko
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HP 8360 Series - Upgrade and Conversion Questions
Hello,
I saw the other thread related to repairing of the 8360 series and I
have some questions related to upgrades and conversion from 836x1B to
836x0B.
836x1B were made for 8510C which is fine but I would like to use it
outside of the 8510C and I want to upgrade the front panel. I know I can
use the software emulation for the panel but I would like to get the
physical one.
Does anyone know if the procedure is plug-n-play? Remove the 836x1B
blank panel and drop in the one from a 836x0B? Are all connectors in
place to do this?
Can I also use a front panel from the A version in the B version?
The only issue I see is that maybe I cannot find the exact match and the
label on the front panel will not be for the exact model for example if
I have 83631B and I cannot get the front panel from a 83630B it will
look strange. I don't mind as long as everything else works fine.
Another upgrade would be to extend the lower frequency range. 836x1B
starts at 45MHz and I would like to get it down to 10MHz same as 836x0B.
Is this doable? Firmware change/DIP switches change? Or boards swap?
836x1B models already have 1Hz resolution from factory which for 836x0B
is option 008. But what about adding the other options like:
Option 001 - step attenuator
Option 002 - internal modulation generator
Option 006 - fast pulse modulation
Can I add these to 836x1B ?
Thanks,
Razvan
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Re: 8566B Power supply fault
I guess I should clarify that everything else looks fine on the display. I have a grid, all the correct characters, and everything else is working but the sweep trace is on the bottom grid line no matter the scale setting. It does point to a problem on the A4A5 step gain board, and the evidence is that the original one was probably swapped with one from a different 85662A to get the other one working, The aluminum top plate has a totally different patina than the rest of the A4 cards, tthe plastic knobs habe a different shade of old, and someone didn't bother putting the screws back in. 
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Re: 8566B Power supply fault
Thanks Michael. I have yet to check the rails with a scope, but for sure if the replacement A4A5 board doesn't get me going the display section troubleshooting will start there. I have to find some weather stripping to go around this new CRT and put it all back together first. Judging from the burn in pattern on the old crt, it was joined to an 8566 and was left on most of its life with no signal on the input. The RF section itself has a White Sands Missile Range property control sticker on it, but I have no idea where the display section came from. I'm still on the fence as to whether or not it's less expensive nowadays to buy the RF unit and display section separately or to get one whole unit that is known to work. If there's not much else wrong with the units I have, I will have only saved a few hundred dollars over the going price of a whole decent 8566B/85662A setup.?
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Re: Can someone rate the HP 8360 83630 etc. as a repair project?
Thanks. The manual stops at assembly A22. A23 to A38 at least are all rf modules, YIGs, amps,? attenuator etc. and repairable normally by replacement. Makes any RF issue rather intimidating.
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Re: HP 4192A LF Impedance Analyzer Repair Assistance Needed
Hi Phil, ? Glad to hear you managed to do the repair and thanks for the information about the reed relays. ? For my part, I also just did a repair, I changed the fan. The problem was hearing a rather persistent and disturbing hum when the device was powered on. This did not affect its performance. I had put dampers on the transformer and fan, there was an improvement, but not enough. The problem was the fan itself. It vibrated, and the box served as a resonance box, amplifying this noise. ? The original fan was a ? Pamotor model: 4800X RPM: 1850/1700 Power: 9 Watts CFM max : 56 noise: 32dBA lifetime: 60,000H @ 40'C ? which I replaced with (from Digikey) OrionFans model: OA109AP-11-3TB RPM: 2000/1600 Power: 8 Watts CFM max : 65/52 noise: 25dBA lifetime: 70,000H @ 40'C ? Now everything is fine. ? Yves ? ? Yves, thank you so much for the guidance. I replaced U2(original part number 1990-0577) with a Broadcom HCPL-2531 and it resolved the issue. ?The 4192A now appears to be fully functional! ?Thanks for the reminder on the RIFA caps, I bought those & other parts to go thru the power supply next. Also, incase someone in the future needs this information - I also replaced reed relays A1K2 and A1K3 (original HP part number 0490-0240 / labelled NEC PRAD-2) with Littelfuse HE721A1210 (this model has the flyback diode, change the last 2 digits to 00 if you want one without it). ?Why did I replace them? I did something stupid and damaged the originals while testing them last week.
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Re: HP 4192A LF Impedance Analyzer Repair Assistance Needed
Yves, thank you so much for the guidance.
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I replaced U2(original part number 1990-0577) with a Broadcom HCPL-2531 and it resolved the issue. ?The 4192A now appears to be fully functional! ?Thanks for the reminder on the RIFA caps, I bought those & other parts to go thru the power supply next.
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Also, incase someone in the future needs this information - I also replaced reed relays A1K2 and A1K3 (original HP part number 0490-0240 / labelled NEC PRAD-2) with Littelfuse HE721A1210 (this model has the flyback diode, change the last 2 digits to 00 if you want one without it). ?Why did I replace them? I did something stupid and damaged the originals while testing them last week.
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Phil
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Re: 8566B Power supply fault
Nice troubleshooting. Some of the toughest ones to problem solve are when someone's already been poking around in there.
You've probably already done this but worth mentioning to check power rails with a scope. As a data point, my 85662A had a bad filter cap on the +23V Unreg line (C3). Also had bad A3A2 and A3A3 boards.
-Michael Bierlein
On Wed, Oct 9, 2024 at 12:01 Matt Harris < kd4pbs@...> wrote: I purchased a 8566B off that auction site that was listed as "Used good" and "tested".? Of course, after some work, it was found to be none of the above.
When I finally found a decent deal on another auction for the 85662A that was also "Used good" and "tested", which means it has a nearly dead CRT and some other issue likely related to the A4A5 board that had not screws holding it in and had cables disconnected from the top, I was at least able to have a very dim display to show me how well the RF unit worked.? It didn't.? The display would flash the ominous Unlock errors of PL1 UNLOCK, PL2 UNLOCK, REF UNLOCK, YTO UNLOCK, and HET UNLOCK.? Punching in different span rates and frequencies would cause the SA to lock up - no button presses worked and the sweep would stop, requiring the INSTR PRESET to be pressed to return to things happening.? Hoping against hope it was simply a power supply issue, I was rewarded to find that the -40V supply fuse had blown.? Replacing it with another 3AG 1.5A fuse saw this immediately blow when the power cord was plugged in.? I had assumed a bad tantalum, but even with every power connection removed from the -40V rail, it was still shorted to ground.? Using a low-ohms scale, I was able to narrow down where on the trace was the most likely shorted to ground, but nothing was evident other than the fact it disappeared under the regulator power transistor heatsink.? Figuring this had to be where the issue was, I removed all the TO-3 transistors and the regulator from the heatsink, and removed the whole block.? Once removed, the problem was very evident.
The interesting part about this is that the insulator had no way to move on it's own.? All the transistors had original date codes from when the unit was made (1985) but the TO-3 packaged regulator U1, which is part of the +12V regulator circuit had a date code of 2023.? So, within the last year or so, someone tried to fix the unit by replacing a (likely blown) U1 regulator, but didn't pay attention to getting the insulator back on the bottom of the heatsink properly, and likely decided the unit was not worth trying to figure out what issue they had next with this old gal - which as it turns out was simply carelessness.? After cleaning up the little bit of arc damage to the trace and heatsink, then properly reassembling everything, no unlock warnings were observed.??
Unfortunately, things aren't working 100% yet, as I still have to put the replacement CRT into the 85662A and troubleshoot why nothing but a flat line at the bottom of the display is seen.? This issue is likely something in the display section, since I suspect problems with that A4A5 card. >:(
Someone might have a similar issue in the future, and hopefully this info will help.
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I purchased a 8566B off that auction site that was listed as "Used good" and "tested".? Of course, after some work, it was found to be none of the above.
When I finally found a decent deal on another auction for the 85662A that was also "Used good" and "tested", which means it has a nearly dead CRT and some other issue likely related to the A4A5 board that had not screws holding it in and had cables disconnected from the top, I was at least able to have a very dim display to show me how well the RF unit worked.? It didn't.? The display would flash the ominous Unlock errors of PL1 UNLOCK, PL2 UNLOCK, REF UNLOCK, YTO UNLOCK, and HET UNLOCK.? Punching in different span rates and frequencies would cause the SA to lock up - no button presses worked and the sweep would stop, requiring the INSTR PRESET to be pressed to return to things happening.? Hoping against hope it was simply a power supply issue, I was rewarded to find that the -40V supply fuse had blown.? Replacing it with another 3AG 1.5A fuse saw this immediately blow when the power cord was plugged in.? I had assumed a bad tantalum, but even with every power connection removed from the -40V rail, it was still shorted to ground.? Using a low-ohms scale, I was able to narrow down where on the trace was the most likely shorted to ground, but nothing was evident other than the fact it disappeared under the regulator power transistor heatsink.? Figuring this had to be where the issue was, I removed all the TO-3 transistors and the regulator from the heatsink, and removed the whole block.? Once removed, the problem was very evident.
The interesting part about this is that the insulator had no way to move on it's own.? All the transistors had original date codes from when the unit was made (1985) but the TO-3 packaged regulator U1, which is part of the +12V regulator circuit had a date code of 2023.? So, within the last year or so, someone tried to fix the unit by replacing a (likely blown) U1 regulator, but didn't pay attention to getting the insulator back on the bottom of the heatsink properly, and likely decided the unit was not worth trying to figure out what issue they had next with this old gal - which as it turns out was simply carelessness.? After cleaning up the little bit of arc damage to the trace and heatsink, then properly reassembling everything, no unlock warnings were observed.??
Unfortunately, things aren't working 100% yet, as I still have to put the replacement CRT into the 85662A and troubleshoot why nothing but a flat line at the bottom of the display is seen.? This issue is likely something in the display section, since I suspect problems with that A4A5 card. >:(
Someone might have a similar issue in the future, and hopefully this info will help.
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You could build one with discrete components. Might be tight to fit them all on there. Or fabricate a small daughter board that sockets into the board.? Datasheet for the UPA104G is online and provides the schematic.?
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-Frank
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Bit more fault finding on unit 1 and I do indeed have a pulse from the timing board going into a UOA104G on the transducer board, but nothing coming out.?
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UPA104G seems to be unavailable now. Ebay has them, but probably a good chance they are fake or factory rejects.?
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Also, I could do with a good scan of the transducer board if anybody has one. The service manual copies online are appalling.?
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Wanted: Hp 2225a ThinkJet printer .... or parts mule ...
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Looking for an Hp 2225a ThinkJet printer, ? "A" version, having HP-IB
Or PCB guts ...? parts mule...
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Contact me Off-List (PM)
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thank you,
rick
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This morning my 8568B didn't start. The fans go, the Instr check 1 red LED is on.
In the afternoon, it started it again and I could use it normally.
Now again as above, it does not start.
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Have someone suggestions before starting the battle?
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Thanks
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Gianni
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Re: Can someone rate the HP 8360 83630 etc. as a repair project?
Correct topic link /g/HP-Agilent-Keysight-equipment/topic/105828529
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Re: Can someone rate the HP 8360 83630 etc. as a repair project?
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Service manual for 8360 series available from ko4bb site:
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Re: Can someone rate the HP 8360 83630 etc. as a repair project?
In Melbourne, Australia, I have two paper manuals that might not be on the Keysight web site:
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HP 8360 Series synthesized Sweepers Assembly Level Repair Volume 3 (Inc Options 001, 003, 004, 006, and 008).
SN Prefix 3044A
Manual part No 08360-90060
November 1990
(it is smaller than A4 but bigger than A5, double sided, maybe 300 to 400 pages, weighs just over 2kg, definitely original)
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HP 8360B-Series Swept Signal Generator / HP 8360 L-Series Swept CW Generator Service Guide
SNo Prefixes? ? 83620B/22B/23B/24B/30B/40B/50B? 3844A and below
83623L/30L/40L/50L? ? ? ? ? ? ? 3844 and below
HP Part N0. 08360-90125
February 1999
(it is smaller than A4 but bigger than A5, double sided, maybe 300 to 400 pages, weighs just under 2kg, definitely original)
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regards
Charles Edmonds
VK3CLE
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Re: Can someone rate the HP 8360 83630 etc. as a repair project?
Artek has nothing on the 8360 series, I just checked. They have O&S manual scans for the 863xx series but that¡¯s a whole different beast.? ¡°Not economically repairable¡± and ¡°non trivial fault¡± are like beauty, all in the eye of the beholder ? ¡°Not economically repairable¡± could be a simple excuse to use when you want to upgrade equipment. A bad fuseholder or a slightly worn front panel on an otherwise operational but ¡°out of support¡± sweeper could get you a brand new one. But it could also mean ¡°we gutted this thing of all useable components.¡± Non trivial repair for some is a cake walk for others with more experience, a better lab, deeper pockets¡ I have paper copies of the 8360 operation and service manuals and they stop short of the RF goodies.?
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On Oct 8, 2024, at 3:50?PM, Edward Prest via groups.io <prest.edward.3@...> wrote:
? I was wondering if an old sweeper such as 83630 that has commercial "not economically repairable" faults is repairable on a home repair type budget? I know it depends, assume a non trivial fault. They seem to be well liked. I know nothing about them and little on Hp/Agilent equipment repairs (my experience is mostly older Tek S/A and R&S gens). I understand a CLIP is available from Artek. Do the CLIPs include microwave modules such as rf amps?? I assume all F/W is available. What about lost calibration hassles?
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In general, are they full of hard or impossible to repair custom components? I know that used Agilent YIGs are pricey as being difficult to repair.? ?In running condition these sweepers go for about 4? to $9k so it seems worth a try if the used price is really good- which maybe means its not component level repairable??
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I want to generate cw mostly, occasional sweeps at least to 20GHz. I am not concerned about rf level accuracy but cw needs to be pretty clean.
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Can someone rate the HP 8360 83630 etc. as a repair project?
I was wondering if an old sweeper such as 83630 that has commercial "not economically repairable" faults is repairable on a home repair type budget? I know it depends, assume a non trivial fault. They seem to be well liked. I know nothing about them and little on Hp/Agilent equipment repairs (my experience is mostly older Tek S/A and R&S gens). I understand a CLIP is available from Artek. Do the CLIPs include microwave modules such as rf amps?? I assume all F/W is available. What about lost calibration hassles?
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In general, are they full of hard or impossible to repair custom components? I know that used Agilent YIGs are pricey as being difficult to repair.? ?In running condition these sweepers go for about 4? to $9k so it seems worth a try if the used price is really good- which maybe means its not component level repairable??
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I want to generate cw mostly, occasional sweeps at least to 20GHz. I am not concerned about rf level accuracy but cw needs to be pretty clean.
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Harold Foster
Frank Mashockie