Re: Retrofitting 3.5mm connector from HP 8485A sensor onto an existing HP 8481A sensor - possible?
I think it is likely to work - BUT, the assembly and disassembly will be (at lest) challenging.
?
The thermistors may be similar, and possibly the thermistor board in the cartridge (you need to check this carefully before you start.? If the cartridge are the same, it would be straight forward,? if only the thermistor board is the same it will be a bit more difficult.? It might be reasonable o pick up a dead 8481 to practice disassembly on.
?
HP did sell the cartridges some time ago but they found that many attempts to replace the cartridges resulted in damage to the matching components in the head.
?
I would look carefully at the part list for the 8485 to get an idea as to how difficult the disassembly / reassembly will be.? It is relatively easy to get the cartridge out of the 8481,??
?
keep us posted as to how it works out - pictures would be very desirable.
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Re: 33210A load waveform over Ethernet
Hi Peter, ? I don’t have 33210A, but it’s same thing with an 33220A. ? I used the free Agilent IntuiLink Waveform Editor software. In the File Properties menu, I chose the number of points; here it was 10,000. I added some basic shapes to get 10,000 points. ? I sent everything to volatile memory for testing (you can choose volatile or non-volatile). The frequency was 1 kHz and 1 Vpp. ? The generator's mode is ARB, with BURST mode enabled; choose 1 cycle only. ? Trigger setup: set it to manual mode. ? You can trigger manually by pressing the TRIG button, or send the GPIB command *TRG ? Yves ? ? 
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-----Message d'origine-----
De?: [email protected] <[email protected]> De la part de Peter Gottlieb via groups.io
Envoyé?: 21 mars 2025 09:02
??: [email protected]
Objet?: [HP-Agilent-Keysight-equipment] 33210A load waveform over Ethernet ? Just wondering if anyone has experience loading a one-shot retriggerable waveform over Ethernet into a 33210A arbitrary waveform generator. ? I'd love to hear the Reader's Digest version of how I can do this. ? I need 10k points at a rate of 1 or 10 kHz. ? Peter ? ? ? ?
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Re: OPT 003 (48-440 Hz compatible) fan (full size "Muffin" type fan) - replacement requirements?
If it is from a 8660, don't be tempted to go with a lower power fan, HP had some reliability problems with early 8660A & 8660B, this lead to them offering a free upgrade to a larger size fan in 1974 to improve the cooling;
?
David
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Re: OPT 003 (48-440 Hz compatible) fan (full size "Muffin" type fan) - replacement requirements?
Robert, Adrian - thank you both for adding to discussion - this information helps because I also have OPT 003 in old HP 8660 series synthesizer (also very heavy machine) so good to have these options.
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33210A load waveform over Ethernet
Just wondering if anyone has experience loading a one-shot retriggerable waveform over Ethernet into a 33210A arbitrary waveform generator.
I'd love to hear the Reader's Digest version of how I can do this.
I need 10k points at a rate of 1 or 10 kHz.
Peter
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Re: OPT 003 (48-440 Hz compatible) fan (full size "Muffin" type fan) - replacement requirements?
The difference with the option 003 is that a DC fan is fitted rather than the mains (50/60 Hz) AC one in the standard unit. This give you more choice of replacment fan. Take the old one out and see what model it is. Any modern DC fan of the right size and voltage will work.
The OPT 003 fan can't be a 400Hz unit because it still has to run at 48Hz. There is no such thing as a 48Hz to 400Hz AC fan (unless it is really a DC fan with built in power supply).? I've actually used / installed HP and Tektronix kit on aircraft using the 400Hz supply.?
?
Robert G8RPI
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Re: How to recover the video of my graphic 54810-66505 card
hello,
?
Does anyone have the schematic of card 54810-66505? (Video pci card)
This prevents the motherboard from starting up.
The same with other motherboard
thank you
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Re: OPT 003 (48-440 Hz compatible) fan (full size "Muffin" type fan) - replacement requirements?
What is the problem with it? I had a very noisy one of these fans and any 400Hz capable replacement was very expensive. In the end I simply took the old one apart and replaced the two bearings.
They were standard imperial sized units that were available from stock here in the UK, reassembled and all was well, took about an hour and even with top quality bearings (SKF) the cost <15 GBP.
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Re: Retrofitting 3.5mm connector from HP 8485A sensor onto an existing HP 8481A sensor - possible?
"F1EKU via groups.io" <rfconsulting.fr@...> writes: From experience, the 8481A series does not perform up well beyond 18
GHz. The response drops very quickly towards 19/20
GHz, and at 26.5 GHz, the response difference is more than 3 to 4
dB. The N connector is not responsible for this poor
performance, as 85025A detectors easily perform up to 40 GHz with only
a few glitches due to VSWR beyond 18.6 GHz.
Conversely, an 8485A often performs up to 30 or even 33 GHz. I can confirm that. Last week i tried to do flatness calibration on my 83752A sweeper. As i only have a 8485D that accepts a max input level of -20dBm, i tried the 8481A instead. But exactly as you said, the levels where low by at least 3dB above 19GHz.
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Re: A homemade diode power sensor for HP meters
Hi Jeff:
Isn't this a years old thread?
Did this home brew power sensor project go anywhere, in the mean time?
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Re: Retrofitting 3.5mm connector from HP 8485A sensor onto an existing HP 8481A sensor - possible?
Thank you for detail understanding!
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Re: looking for service manual for HP4934A
Dave,
Maybe its the about the same inside??
Please upload it to the files area. I will download and take a look at it.
Thanks
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Re: looking for service manual for HP4934A
Thanks Peter, maybe that it. Its covered in another model numbers manual.
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Re: Retrofitting 3.5mm connector from HP 8485A sensor onto an existing HP 8481A sensor - possible?
From experience, the 8481A series does not perform up well beyond 18 GHz. The response drops very quickly towards 19/20 GHz, and at 26.5 GHz, the response difference is more than 3 to 4 dB. The N connector is not responsible for this poor performance, as 85025A detectors easily perform up to 40 GHz with only a few glitches due to VSWR beyond 18.6 GHz. Conversely, an 8485A often performs up to 30 or even 33 GHz.
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Re: microscope / high magnification camera options for soldering, faults, and other examinations/inspections
I purchase a used Nikon 8x, 20x, 100x binocular microscope quite a while ago, added the Illuminator ring. It is a superb instrument, but not light in weight. Price was $75 then, 15 yrs. ago. I have seen several name brand microscopes in government surplus auctions recently in the $75-150 range, ie. Bausch & Lomb, Nikon, etc. For a quick and dirty usage, Chinese will work, mostly, but for serious work, the used name brands are a great investment.
Don Bitters
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Retrofitting 3.5mm connector from HP 8485A sensor onto an existing HP 8481A sensor - possible?
Have a HP 8485A sensor I bought used, turns out it had been damaged due to overload, seller refunded, now have a physically nice but electrically dead HP 8485A sensor.
Have a HP 8481A sensor surplus to my needs.
I'm interested in the possibility of converting my 8481A to an 8485A (3.5mm male connector), albeit not calibrated, in lieu of the cost of buying a working 8485A.
Found a Keysight publication that seems to be quite comprehensive coverage of this era sensor:
This is titled "Keysight 8480 series coaxial power sensors operating and service manual." I wasn't aware the manual existed; it is current publication from Keysight.
The manual has pretty extensive "how to disassemble and reassemble" and other maintenance activities.
The underlying thermocouple sensor element appears to be the same part number for 8481A and 8485A, so this brings me to my question - could I create a thermocouple sensor with a 3.5mm HP male connector that could subsequently be recalibrated and used as an 8485A?
I've searched and haven't found any reports of the practicality or result of actually trying this procedure.
Thanks for any comments, observations, or requests for clarification.
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Re: microscope / high magnification camera options for soldering, faults, and other examinations/inspections
On 3/20/25 13:54, Radu Bogdan Dicher via groups.io wrote: WIFT trinocular brand new (any input on the brand?). If it says made in China, they are mostly subpar compared to used good Euro and Japan lenses.
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Re: microscope / high magnification camera options for soldering, faults, and other examinations/inspections
A bit of a follow up on this. I think the point about stereo microscopes giving indication of depth is invaluable, and exactly the kind of information one hopes to get on here.?
But I will say I also got one of these "thick pen" sized microscope cameras - working wirelessly on phones, or through USB on computers - and I think this is an excellent addition to the bench. Its best use is inspection - where the large screen does a tremendous job at displaying huge solder joints and component pins and?burned flux etc - and not soldering, due to the point above. I paid about $30 for mine, which I think is a steal for what it does.?
Certainly, I'm still pursuing getting a real, lab-grade stereo microscope. Currently hesitating between giving the Nikon(s) I mentioned above a test drive, and just biting the bullet and getting a SWIFT trinocular brand new (any input on the brand?).? Radu.?
On Tue, Mar 18, 2025 at 8:56?PM Radu Bogdan Dicher via <vondicher= [email protected]> wrote: To assist with feedback on this local offer for the Nikon microscopes, I uploaded to the photos section pictures of the two units this local seller has: /g/HP-Agilent-Keysight-equipment/album?id=301362.? A couple of questions: - Is anyone familiar enough to maybe tell what the differences between the two are? I'm not sure which one I should get, if I go for this.?
- I think both seem to come with booms, which I think are a little costly on their own. Maybe this makes their offer a bit more competitive??
Thank you, Radu.?
And that, my dear sir, is exactly why I wrote the program.
Please contact me off? list.? I didn't exactly design some of this for
public consumption (mostly the Embarcadaro stuff), and you'll need the
libraries I've created.
Haven't tried to rehost it, so it'll be an experience.
madyn@...
Harvey
On 3/18/2025 4:59 PM, David McQuate via wrote:
>
> I use C++ a lot, usually with QtCreator, though I have previously used
> Visual Studio.? I have Eagle 7.5, 7.6, and 7.7.? I use SCAD for 3D
> printing and also for general 3D modeling.? Your program seems like a
> natural for designing 3D printed cases for PC boards, and also for
> creating parts placement files for automated PC builds, such as that
> done by JLCPCB.? Would you be OK giving me a copy of the source?
>
> David
>
> On 2025-03-18 13:14, Harvey White wrote:
>
>> I wrote a C++ program that disassembles the .brd file for a project.
>> It creates an OpenSCAD document that places models of the parts onto
>> the board, giving you a board visualization.? It can handle internal
>> and external fillets on the board edges. Depending on which parts you
>> use, you may or may not need to model some specific parts (in
>> OpenSCAD) to build up your own library.
>>
>> As part of the process, the program has to read and calculate the
>> part placement? from the .brd file.? I know it does EAGLE 7.7, not
>> sure about what else.
>>
>> It was originally based on NopHead's libraries, but I got errors I
>> couldn't track down (not documented), and just bagged it and wrote my
>> own.
>>
>> How?are?you?with?C++?(Embarcadero?C++?community?version)?
>>
>> Harvey
>>
>> ps:?I?can?attach?a?picture.
>>
>>
>>
>> On?3/17/2025?11:29?PM,?David?McQuate?via??wrote:
>>>
>>> I'd like to know more about the program that allows you to model the
>>> PC board in SCAD, and find the XY of any part.
>>>
>>> Thanks!
>>>
>>> David
>>>
>>> On?2025-03-17?20:01,?Harvey?White?wrote:
>>>
>>>> I use an American Optical (because it was cheap) and found a nice
>>>> heavy stand to hold it up.? I have a fiber optic ring light on the
>>>> microscope.
>>>>
>>>> I?find?that?an?auxiliary?light?can?help?to?illuminate?from?the?side?as?well.
>>>>
>>>> I would build a board holder that allows you to position any part
>>>> of a board under the microscope without moving the microscope. How
>>>> complicated you make that little board holder is up to you. Maybe
>>>> move manually and lock into place.
>>>>
>>>> if you were building boards by hand, and using EAGLE, then I can
>>>> show you a program that models the PC board in OpenSCAD. That same
>>>> parsing routine can find the XY of any part.
>>>>
>>>> that?might?help?a?bit.
>>>>
>>>> Ideally, you want to move the board in X and Y, then rotate for the
>>>> best soldering angle.
>>>>
>>>> Harvey
>>>>
>>>>
>>>>
>>>> On?3/17/2025?2:59?PM,?Radu?Bogdan?Dicher?via??wrote:
>>>>>
>>>>> Thank?you?all,?great?input.
>>>>> From these choices, it sounds like a stereo microscope on a boom
>>>>> would be ideal. I do tend to work on all sorts of positions and
>>>>> oftentimes spill outside of the desk/bench. Also, some of the
>>>>> boards I need to examine are too large to fit under a microscope
>>>>> with a stand. I'm not sure exactly how well this relative freedom
>>>>> to move the microscope around works. But the idea to have that
>>>>> available is very exciting - I'm really tired of using my multiple
>>>>> hand magnifiers with their own lights and often another flashlight
>>>>> on the other hand. My eyes get terribly strained with that setup.
>>>>> Probably a stupid question, but I know nothing on the "stereo
>>>>> microscope" topic - are these working well for people wearing glasses?
>>>>> Thank?you.
>>>>> Radu.
>>>>>
>>>>>
>>>>> On Mon, Mar 17, 2025, 10:29 AM John Griessen via
>>>>> <> <john=[email protected]> wrote:
>>>>>
>>>>> ????On?3/17/25?07:59,?Dave?McGuire?via??<>?wrote:
>>>>> ????>?On?3/17/25?00:02,?Radu?Bogdan?Dicher?via?
>>>>> ????<>?wrote:
>>>>> ????>>?Having?done?enough?(red)?eye?cracking?smd?soldering?jobs?or
>>>>> ????inspections?in?case?of?suspected?failure?(cold?joints,?etc.),?I've
>>>>> ????>>?decided?to?invest?a?bit?on?a?better?optical?setup.
>>>>> ????>>?There's?plenty?of?cameras?on?the?marketplaces?and?retailers?out
>>>>> ????there,?but?what?are?some?better?choices??Good?experiences?with
>>>>> ????>>?some?specific?models?
>>>>> ????>>?Also,?what?to?watch?for??Specs,?minimal?magnification?that
>>>>> ????crosses?over?a?good?threshold?
>>>>> ????>>?I?have?a?couple?of?large?screens?at?my?bench?-?I'm?thinking
>>>>> ????this?will?be?best?done?by?shooting?this?over?to?one?of?those.?USB,
>>>>> ????>>?HDMI?...
>>>>> ????>>?Lighting/LEDs?making?a?significant?difference?
>>>>> ????>>?Thank?you?for?your?input.
>>>>> ????>
>>>>> ????>????The?Mantis?by?Vision?Engineering.
>>>>> ????>
>>>>> ????>????On?the?prototyping?bench?I?moved?from?a?Nikon?SMZ-1?with?an
>>>>> ????after-market?LED?ring?light?to?a?1st-generation?Mantis?about?ten
>>>>> ????>?years?ago,?and?upgraded?to?a?Mantis?Elite?last?year.
>>>>> ????>
>>>>> ????>????The?Nikon?is?a?binocular?inspection?microscope?with?great
>>>>> ????optics?(typical?of?Nikon)?and?excellent?overall?performance.??I?had
>>>>> ????>?an?opportunity?to?try?out?a?Mantis?when?visiting?a?customer's
>>>>> ????lab.??I?was?astonished?by?its?capabilities?and?purchased?one
>>>>> ????>?immediately.
>>>>> ????>
>>>>> ????>????My?upgrade?to?the?Mantis?Elite?last?year?was?a?similarly
>>>>> ????impressive?thing.
>>>>> ????>
>>>>> ????>????Two?important?considerations?are?binocular?optical?paths?and
>>>>> ????lighting.
>>>>> ????>
>>>>> ????>????Binocular?optics?are,?IMO,?absolutely?required?for?SMT?work.
>>>>> ????>
>>>>> ????>????Lighting?is?next.??People?often?skimp?on?this?and?use?a
>>>>> ????random?desk?lamp?or?whatever?happens?to?be?lying?around,?but?a?proper
>>>>> ????>?lighting?system?makes?all?the?difference.??There?are?cheap
>>>>> ????aftermarket?LED?right?lights?that?are?surprisingly?effective;?this
>>>>> ????>?suggests?that?the?lighting?really?isn't?that?difficult?a?problem
>>>>> ????to?solve.??The?key?is?360-degree,?oblique,?even?lighting?to
>>>>> ????>?eliminate?shadows.??(lighting?is?built-in?on?the?Mantis?microscopes)
>>>>> ????>
>>>>> ????>???????????????-Dave
>>>>>
>>>>> ????Hi?Radu,
>>>>>
>>>>> ????I've?got?Greenough?scopes?(binocular)?by?Olympus?and?Vision
>>>>> ????Engineering?(precursor?to?Mantis),?and?fiber?light?rings?and?sources
>>>>> ????to?sell.
>>>>>
>>>>> ????The?Vision?Engineering?ones?are?kind?of?large,?but?trying?an
>>>>> ????Olympus??Greenough?would?be?painless?--?you?could?return?it?if?not
>>>>> ????liking?it.
>>>>>
>>>>> ????When?I?assemble?SMT?boards?I?use?a?Greenough?on?a?boom?that?lets
>>>>> ????me?move?with?fine?dials?in?X?and?Y?(and?of?course?Z?for?focus).
>>>>>
>>>>> ????I've?also?tried?the?Vision?Engineering?and?it?would?probably?be?a
>>>>> ????speedup?tool,?but?Ive?not?afforded?enough?bench?top?space?to?use
>>>>> ????one?effectively?yet.
>>>>>
>>>>> ????Also?have?Nikon?SMZ-7?and?a??Vision?Engineering?Greenough?for?sale.
>>>>>
>>>>> ????Booms?to?hold?them?are?super?heavy,?so?looking?locally?makes?the
>>>>> ????most?sense.
>>>>>
>>>>> ????I?agree?with?Dave,?that?if?you?want?to?do?prototypes?your?speed
>>>>> ????and?quality?will
>>>>> ????improve?drastically?with?stereo?vision?--?it?puts?your?"there"?in
>>>>> ????the?micro?world...??Also?you?will?notice?more?since?flat?view
>>>>> ????onscreen?doesn't?translate?to?3D?in?your?mind?well.
>>>>>
>>>>> ????The?large?screens?might?be?OK?for?some?things,?but?not?for?active
>>>>> ????seeing?when?looking?for?tiny?cracks,?missing?solder,?adequate
>>>>> ????solder?paste,?etc.
>>>>>
>>>>> ????Now?to?get?busy?cleaning?and?photographing?the?ones?I?mentioned...
>>>>> ????--?????John?Griessen
>>>>> ????Albuquerque?NM
>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>
>>
>>
>>
>>
>>
>
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"Jean-Luc F1ULQ via groups.io" <f1ulq@...> writes: Hi Sven,
you have to place a new CR2032 on the mainboard, then do a CMOS
default and set the correct date/time.
Normally, after that all should be OK. I had the same issue on mine,
fixed it that way. Thanks, good to know that this must work - i was afraid of some bug or unknown procedure. In the beginning this didn't work for me with the symptoms I described. I left the unit without battery for a night and than it worked the way you described and i was happy. But Windows XP crashed later during the day, and after that it didn't work again. Also had some problems that USB didn't work. I now bought an old used mainboard with the same form factor and PCI slots, an Asus P8B75. Hope i can implant this, not sure how compatible the Agilent Software is with other boards. Would also be a nice upgrade as this one has an i5-3330. Maybe i'll even try Windows 7. 73 DM1SV
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Re: Agilent/Keysigh ESG series CLIP
The exact P/N of the board Is E4400-60141
?
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factory
Gerard
Santiago Z