Re: HP 3325A/B Option 002 HV output kit - who wants one?
Please add me to the list for one kit.
Thanks, Carlos
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Ok, I've got everyone who has posted or messaged me on the list now.
I'll put the current list up this weekend so you can all double check and correct me if I made any mistakes. ?
A little bad news though.... Due to the Corona virus, Japan Post has basically shut down all deliveries to 153 countries as of yesterday....
It ultimately won't stop me from completing this, but it will delay things for a while, and I have no idea how long. ?
I'll keep the updates coming, and if I can get the PCB's delivered (The major carriers like Fedex, DHL, UPS, etc are currently still delivering into Japan) then pictures and a few performance tests will be forthcoming too.
Anyway, orders will remain open until the last minute, so keep the list growing! I got 53 PCB's to order on the list so far (and a big portion of those are full kits, so I'll have a good amount of parts to sort through too!)
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When you power the DMM on it goes through a POP (Power On Preset routine). The display does several things including showing all 8’s. Are you getting this? This is also the ideal time to check for activity on the suspect IC’s. Check the manual for what is displayed during the POP. If the DMM does not complete POP it should show an error code, see manual for codes and meaning.
If the manual is suggesting one of 2 IC’s then you could check for activity on the address and data lines on the 2 IC’s with an o-scope during POP. Look for proper levels, TTL or CMOS if a digital IC and good wave shape - data should be square or rectangular shapes with little or no rounding of leading edges, ramps should be straight lines, check for any overly warm IC’s. Again check the cabling connections for oxidation and good contact, DeOxit is your friend if used sparingly. The display brd has to have a clock signal to operate - check the clock, if I recall correctly it should be 1 MHz.
If POP is good and no errors then, try putting a 1VDC into the DMM and then chase the signal through the signal path until it is digitized to be sent to the display (see manual). Don’t be afraid to gently wiggle cables and gently press on brds and components, looking for any changes on your display.
A dumb question, where is the front/rear connector switch set to, and if you select ohms mode does your display still show all 0’s (with nothing connected to the inputs)?
Don Bitters
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Re: Phase Locking an 8350 Plugin
For completeness, I should have shown the 3dB attenuator that's installed at the 8640A output.? Of course, it doesn't affect the frequency calculations.
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Re: Phase Locking an 8350 Plugin
Hi Mike?
?
To lock the 2 to 20 Ghz plug in
you could always use an EIP 578 Source locking
counter
?
But I only lock up? the band I am
using the 2 to 20 Ghz plug in uses different multiplication for each band
?
Sorry never tried below 2 Ghz
?
Regards Paul
?
?
Hi Matt. Thanks for your interest. And I agree with your analysis of
the situation here.
I also have a 83522A plugin (10 MHz to 2.4 GHz). They mention phase locking but
no example of what equipment to use.
Anyway, I look forward to playing with this!
Mark
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Re: Phase Locking an 8350 Plugin
Hi Matt. Thanks for your interest. And I agree with your analysis of the situation here.
I also have a 83522A plugin (10 MHz to 2.4 GHz). They mention phase locking but no example of what equipment to use.
Anyway, I look forward to playing with this!
Mark
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Re: Phase Locking an 8350 Plugin
I drew a quick picture of the setup, that I hope is right.? It looks like the reference frequency equation, from the HP 83590A manual, would be correct if you removed the "3.8 GHz" term.? The calculations are based on the fact that the HP 8709A synchronizer input is at 20 MHz, for phase lock.? So, the frequency difference between the "83590A Aux Output" and the "8640A output multiplied by N2" would be 20 MHz at phase lock. 
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Re: Phase Locking an 8350 Plugin
From what little I know about this series of oscillators, I would guess that the equation is not intended for the 83590A unit.? It is intended for an oscillator plug-in family member that has the extended range down to 10 MHz.? The "3.8 GHz" value used in equation only makes sense for the other oscillator family members that go down to 10 MHz.? These oscillators can switch in an additional mixing stage to operate below 2 GHz.? This additional stage uses a fixed 3.8 GHz cavity oscillator.? The 83590A doesn't have the 3.8 GHz oscillator, nor can its "Fo" go below 2.0 GHZ.
Someone at HP probably did an erroneous "cut-and-paste" of the equation, from another document within that oscillator plug-in family.? Just a guess, though!
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Re: Fixing a sick 4332A LCR meter
Hello Sean,
I think we're making progress !
The 12 kHz, 20mV p/p signal is a sign that there's something wrong in the oscillator, but the good news is that nothing seems to be completely "fried". We'll have a closer look at the oscillator and low-Z amplifier whenever you have time.
Then of course, seeing the needle moving completely off-scale in Ohms with an open-circuit input is normal in any well-behaved ohmmeter (the same is true in L mode, since open-circuit is equivalent to "infinite" inductance).
Did you try to measure a 1 kOhm resistor ? This is bound to tell us something.
So there's hope, your meter is not very far from full functionality !
SIncerely,
Joel Setton
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Re: Where to connect the efc input on a 10544A?
Hi,
Thanks, that is a good idea with the DC-DC converter. I guess I can go
with that and make it jumper configurable to enable or disable efc.
Szabolcs
Robert G8RPI via groups.io <robert8rpi@...> ezt írta
(id?pont: 2020. ápr. 1., Sze, 18:38):
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It's up to you. How close do you want to be abl to set it?
A +-5V supply an 10 Turn pot is not too hard to do. Personlly I've used a isolated 12V output DC-DC converter with lots of filtering, a 10V reference IC a 1:1 resistive divider connected to the EFC common, and a 10k 10 tun pot.
Robert G8RPI
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I have the following, all is OBO:
?
Agilent 16702B logic analyzer with 2 cards, and lots of accessories $500.00 plus shipping
?
HP 8560E Spec An with TG, Demod, and Mass Memory – some of the buttons are intermittent $800.00 plus shipping
??
HP 53132A Freq Counter with Factory 3ghz option.? $600.00 plus shipping
?
Agilent 66332A IT IS HEAVY. 125.00
Pics https://imgur.com/a/hgUVc0I
Thanks, Michael
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I have a question about 16555A LA boards.
Greetings all.
I've been working on several 16555A LA cards (corrosion on the bottom) to use in a pair of 16702B mainframes
and I've noticed something that has me curious.? On the top of each board near the 100MHz oscillator, etched
on the board, is a model number.? Some are 16555-66505.? Some are16555-66503 (the older ones).? One has
a label placed over the second part of the number (after the dash) that says 66405 and one has a label over the
original 66503 that says 66505.? Most of the others are etched 16555-66505 but you can tell that at one time
there was a label over the second number and the adhesive is still there but the label has been removed.? Several of these
boards have a label on them indicating they may contain remanufactured parts.
I know it's probably trivial but I was wondering if anyone in the group might know what that number represents.
I am assuming age by the date code that is on the data bus connector.? Two of them came from a 16500C and are
dated '94.? Any thoughts?
Thanks.
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I have the following, all is OBO:
Agilent 16702B logic analyzer with 2 cards, and lots of
accessories $500.00 plus shipping
HP 8560E Spec An with TG, Demod, and Mass Memory – some of
the buttons are intermittent $800.00 plus shipping
HP 53132A Freq Counter with Factory 3ghz option.? $600.00 plus shipping
3x HP 8116A Pulse/Function Generator.? 1 has the GPIB option.? 150 for the one with GPIB, and 100 each for
the others, plus shipping.
Agilent 66332A IT IS HEAVY. 125.00
Pics
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Don, I appreciate your message encouraging me to tackle this 3455A.? I have made a few inches of progress with it.? The 10V reference is spot on.? The input voltage from the panel reaches the A10 board.? The manual indicates the problem may be with one or the other of two ICs, one of which I replaced with no difference.? The other is soldered in and I would like to know if I can test it in situ before trying to find a replacement and installing it.
The unit responds to the panel and acts as though it's working but the display shows zeros.? On Ohms it even puts out some current via the input jacks.? So it works but no cigar.
Of course I don't have a spare unit to swap boards.? So I am baffled at this point.? All suggestions welcome although paging back and forth in the manual to figure out what is where is a bit troublesome.
Bob
On Wednesday, April 1, 2020, 08:35:26 PM PDT, Don Bitters via groups.io <donbitters@...> wrote:
Bob,
I have probably repaired 50 or more 3455A’s in the 16 yrs (-5 yrs ago) when I worked for a defense contractor.? The original manual was detailed enough and the trouble shooting tree worked quite well.? One of the troubleshooting premise was that you had another 3455A’s to trouble shooting with - primarily for inboard vs outboard problem isolation.? Be very careful because the ground for the inboard and outboard circuits are different and isolated from each other.? The special jumper cable set allowed you to swap the two boards from unit to unit without removing the brds.? You would simply watch for the problem to transfer units or not to isolate the failed brd. Then follow the T-shoot tree. Most of the problems I saw were with the fans-the German speed controlled ones-replaced by 12VDC fan (see 11729C fan replace); followed by PS supply issues; the inboard/outboard interconnect cables-the contacts are tinned, not gold plated; calibration issues-usually the high precision resistors under the metal input shield-they are 0.01%;the reed relay on the same input board-sometimes cured by carefully demagnetizing the reed relay; and contamination issues on the input board-required cleaning with soap, water, and brush, then cleaning with 90% IPA and thorough blow dry- the humicoat should have a high gloss with no smudges.? Also had 2 problems with the Burr-Brown ADC.? Occasional problem with input - somebody tried measuring ohms with +100VDC applied.? Other vendors supporting the 3455A had parts units to swap parts and assemblies from, as we also had, but it was simpler to troubleshoot and repair the DMM to component level.? The 3455A was a little slower in operation (manual and GPIB operation) than the 3456A.? Both units are high quality, high resolution DMM’s.? We used the Fluke 5700A to align and cal the HP 3455A.
Don Bitters
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Re: First Gen HP 54810A with dead HD, Got ISO 3.5, Any way to write it to a drive?
Maybe it's worth to try a more recent version of Norton Ghost to recover the .GHO image on your Windows 10 machine?
Windows 10 still has a compatibility mode for running old software, did you try it?
Another option would be to obtain a Windows 95 virtual machine (here:? ) and to run the software on it.
Regards
Jan
Some customers have been successful performing system recoveries with external CDROM drives from companies such as MicroSolutions. These drives connect to the scope’s parallel port. Since this method of recovery is unsupported by Agilent, customers are responsible for all configuration of the external drive. 8 For the recovery to be possible, you will need to mount the external drive and boot the scope from a floppy disk (the drive’s manufacturer may be able to provide this disk for you). At the DOS prompt, you must be able to navigate to the drive and see the drive’s contents with the dir command. If you can successfully get to this point, you should be able to perform a recovery with a special A.03.50 recovery CD. You may download the CD image at the location given below or contact Agilent technical support for a copy of this CD. The following recovery software is available for download. This is an .ISO CD-ROM image file. You will need to use CD burning software such as Nero or Easy CD Creator to create the CD from this file. Do not simply copy the file onto the CD as this will not work. A.03.50 Recovery CD: ftp://ftp.agilent.com/pub/callpub1/ddt/scope/548xx/Upg_Rec/3_5/3_5_rec.iso?
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On Wed, Apr 1, 2020 at 04:45 PM, John Corini wrote:
I have a number of PCBs that are available?from a non-functional 8604B.
Do you happen to know what options were on this 8640B? I'd like to expand the options on my OPT323 version to those on the avionics versions... even if custom.
My OPT323 still needs work on to get the counter going, plus verify other functionality when the corroded and suspect parts are replaced.?
I have cracked gears and need to repair or replace those too.? Thinking will repair for now since I'm on the tight budget plan.?
Might be able to use some of the boards if they'll swap or can be modded to fit to enable more functionality.?
Wouldn't hurt to have another 0860-60029 (looks like I have a 08641-60029) and 0860-60177... assuming they're compatible boards for the price.? Then again... might just be cheaper to repair the ones I have unless there's a component that's unobtanium.??
Any thoughts from those more experienced with this make and model?
Thanks
James
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Re: First Gen HP 54810A with dead HD, Got ISO 3.5, Any way to write it to a drive?
Some customers have been successful performing system recoveries with external CDROM drives from companies such as MicroSolutions. These drives connect to the scope’s parallel port. Since this method of recovery is unsupported by Agilent, customers are responsible for all configuration of the external drive. 8 For the recovery to be possible, you will need to mount the external drive and boot the scope from a floppy disk (the drive’s manufacturer may be able to provide this disk for you). At the DOS prompt, you must be able to navigate to the drive and see the drive’s contents with the dir command. If you can successfully get to this point, you should be able to perform a recovery with a special A.03.50 recovery CD. You may download the CD image at the location given below or contact Agilent technical support for a copy of this CD. The following recovery software is available for download. This is an .ISO CD-ROM image file. You will need to use CD burning software such as Nero or Easy CD Creator to create the CD from this file. Do not simply copy the file onto the CD as this will not work. A.03.50 Recovery CD: ftp://ftp.agilent.com/pub/callpub1/ddt/scope/548xx/Upg_Rec/3_5/3_5_rec.iso?
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First Gen HP 54810A with dead HD, Got ISO 3.5, Any way to write it to a drive?
Hi,? My loved 54810A died on me.? It is the oldest Gen 1 unit no VIN running 95 and it has not been upgraded.? I did read up on the recovery process from the HP documentation and I have the version 3.5 disc image.??I can open the ISO and I find the files listed below files.? HP suggested that one use a printer port CD Drive to recover it. The Ghost.EXE wont run on my win10 machine.?I do have an XP machine I might get GHOST to run on but it is a laptop.? Any suggestion?? Another option but at a $250 cost would be to buy a drive from ebay but with all the uncertainty I rather do my part of bring the economy to a standstill :-(? ? a few month ago I would just have shelled out the $250 but... Here are the files on the ISO. GHOST.EXE hp548cd.inf
HP548RCV.GHO
Regards,
Ulf
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Re: Does anyone have an HP / Agilent 5021-8405 7" Diecast Frame?
Matthew,
I have sent several private email replies to your inquiries regarding this part, but they appear to not be getting to you.? I get yours just fine.
Check your SPAM filter if you haven't already, or send me a phone number - as I mentioned, I'm getting your messages just fine.
Thanks - Kurt
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Bob,
I have probably repaired 50 or more 3455A’s in the 16 yrs (-5 yrs ago) when I worked for a defense contractor. The original manual was detailed enough and the trouble shooting tree worked quite well. One of the troubleshooting premise was that you had another 3455A’s to trouble shooting with - primarily for inboard vs outboard problem isolation. Be very careful because the ground for the inboard and outboard circuits are different and isolated from each other. The special jumper cable set allowed you to swap the two boards from unit to unit without removing the brds. You would simply watch for the problem to transfer units or not to isolate the failed brd. Then follow the T-shoot tree. Most of the problems I saw were with the fans-the German speed controlled ones-replaced by 12VDC fan (see 11729C fan replace); followed by PS supply issues; the inboard/outboard interconnect cables-the contacts are tinned, not gold plated; calibration issues-usually the high precision resistors under the metal input shield-they are 0.01%;the reed relay on the same input board-sometimes cured by carefully demagnetizing the reed relay; and contamination issues on the input board-required cleaning with soap, water, and brush, then cleaning with 90% IPA and thorough blow dry- the humicoat should have a high gloss with no smudges. Also had 2 problems with the Burr-Brown ADC. Occasional problem with input - somebody tried measuring ohms with +100VDC applied. Other vendors supporting the 3455A had parts units to swap parts and assemblies from, as we also had, but it was simpler to troubleshoot and repair the DMM to component level. The 3455A was a little slower in operation (manual and GPIB operation) than the 3456A. Both units are high quality, high resolution DMM’s. We used the Fluke 5700A to align and cal the HP 3455A.
Don Bitters
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Re: HP 419A DC Null Voltmeter - INSANE behaviour
When you don't ground the center of a balanced supply (two
batteries in series + and -) you don't supply a ground, and the
overall voltage doesn't balance unless the current draw is exactly
balanced, so the circuit sees, say, rather than +13 and -13; maybe
+15 and -11.? There's also the problem that the impedance of each
supply (supposed to be low) depends on the rest of the circuitry
(like the +13 being influenced by the -13 and vice versa.).? No
guarantees what happened (electrically), but oscillations are not
at all surprising.
Harvey
On 4/1/2020 10:02 PM, stan_katz via
groups.io wrote:
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Hope this thread is not totally dead. The 3x switch strange
behavior with oscillations at TP1 of A4 happened to me. I have two
13.2v hand tool nicads to power my 419.? I had wired in the +13
and -13 battery leads into the instrument,? I failed to connect
the neutral wire between the batteries into the instrument power
ground (eg. the case). With that wire added, the 3x insane
behavior was gone.??
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Paul Bicknell
jafinch78 .