Re: HP 8013B Pulse Generator replacement pilot lamps
One way to find info like that is to look up the HP part number on the net with
google and find it listed on some government supplier site. That will get you
the NSN number. You can use that number to cross reference the part to something
recognizable from a known manufacturer (eg, lamps from GE or Sylvania). You can
then look for that part number (eg, 6839).
One site I ran across included the cross reference info just by clicking links;
it was pretty slick.
Paul
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On Wed, Sep 21, 2022 at 10:26:27PM -0400, Dave McGuire wrote: On 9/21/22 22:14, Craig Petersen wrote:
Does anyone have a good source they can point me to for replacement pilot
lamps for the HP 8013B pulse generator? I am able to bodge one in but
would rather find a source of OEM originals. I believe that's a type 6839 bulb, which is currently in stock at both
Mouser and DigiKey.
-Dave
--
Paul Amaranth, GCIH | Manchester MI, USA
Aurora Group of Michigan, LLC | Security, Systems & Software
paul@... | Unix/Linux - We don't do windows
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Re: HP 8013B Pulse Generator replacement pilot lamps
On 9/21/22 22:14, Craig Petersen wrote: Does anyone have a good source they can point me to for replacement pilot lamps for the HP 8013B pulse generator? I am able to bodge one in but would rather find a source of OEM originals. I believe that's a type 6839 bulb, which is currently in stock at both Mouser and DigiKey. -Dave -- Dave McGuire, AK4HZ New Kensington, PA
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HP 8013B Pulse Generator replacement pilot lamps
Good Afternoon all,
Does anyone have a good source they can point me to for replacement pilot lamps for the HP 8013B pulse generator? I am able to bodge one in but would rather find a source of OEM originals.
Best Regards,
Craig Petersen.
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Re: HP 3400A, After replacing two bad caps, I still have meter bounce on some ranges.
Mikek,? have you checked all the electrolytics? I went through mine , and found several O/C, or high ESR. Cheers!...Don.
On Thu, Sep 22, 2022 at 12:49 PM Mikek < amdx@...> wrote: I have two HP3400s on my bench at the moment, I have them both connected to my signal generator with a 50¦¸ termination
I removed the BNC from the sig gen and then reconnected it, the needle overshoots and comes back to the proper indication,
it may undershoot the proper indication, but if it does it's not even 1/2 a line. Both do the same. I even reduced the voltage to 1/2
and removed the 50¦¸ termination, it still did the same. So, only one peak, maybe two.
?OH wait, do you mean on initial warm up or when you connect a voltage.
Yes on initial warm up it does at lot of moving, I just shut both of them down or a few minutes and then restarted, yes, the bounced
5, 6 or 7 times depending on what you call a bounce :-).
???????????????????????????????? Mikek
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Re: 3335A - extender cards
You could see if Douglas Electronics are still going in CA.
They offered a large stock of extenders for common pitches/widths.? I bought a bunch and used some as-is, others I modified or cut down to suit particular instruments.? Gave me a very useful result.
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Re: HP 3400A, After replacing two bad caps, I still have meter bounce on some ranges.
I have two HP3400s on my bench at the moment, I have them both connected to my signal generator with a 50¦¸ termination
I removed the BNC from the sig gen and then reconnected it, the needle overshoots and comes back to the proper indication,
it may undershoot the proper indication, but if it does it's not even 1/2 a line. Both do the same. I even reduced the voltage to 1/2
and removed the 50¦¸ termination, it still did the same. So, only one peak, maybe two.
?OH wait, do you mean on initial warm up or when you connect a voltage.
Yes on initial warm up it does at lot of moving, I just shut both of them down or a few minutes and then restarted, yes, the bounced
5, 6 or 7 times depending on what you call a bounce :-).
???????????????????????????????? Mikek
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Re: HP 3400A, After replacing two bad caps, I still have meter bounce on some ranges.
I have had this unit on all day while working on a second 3400A. I just checked it and every range is working as it should meaning there is no bounce.
?I'll have to check it in the morning when I first turn it on to see if has the bounce then.
?I had no luck using my oscilloscope to help troubleshoot the unit. It had to much 60 Hz riding on the signal.
I tried no ground connection, (3 to 2 pin adapter), I tried both scope and HP3400A ungrounded,
I tried an isolation transformer, with ground and without ground. Just could not get rid of 60 Hz. Then I thought,
maybe it's power supply ripple, nope very low ripple, I also lifted and tested each cap on the
PS board for capacitance and dissipation, all tested good.
?Any advice appreciated.
?????????????????? Thank, Mikek
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Re: HP 3400A, After replacing two bad caps, I still have meter bounce on some ranges.
My 3400A bounces no fewer than 7 times before settling on the correct value - I`ve come to the conclusion that this a correct operation that can`t be improved on. However, what you show in your video might be noise, coming?from a component in the signal path. You could look at the output terminals with an Oscilloscope to confirm this. My 3400A does settle after 7 "peaks" - does your unit ever settle? Good Luck!...........Donald Collie? [ZL4GX]
On Thu, Sep 22, 2022 at 10:20 AM John kolb < jlkolb@...> wrote: Perhaps poor/dirty switch contacts on range switch if only on some
ranges, but I don't think so. The 0.001V and the 1V are the same signal
level out of he impedance as are the 0.003V and 3V ranges.? Is the
bounce much worse on the 0.001V range than the 0.003?? Check and make
sure it's not slightly noticeable on the 0.001V range.? Not likely that
those particular range pairs would be the only contacts bad on the
portion of the range switch before the Impedance Converter so something
within the A2 module.
John KK6IL
On 9/21/2022 5:27 AM, Mikek wrote:
> This video shows worst case meter bounce, after warm up it is a much
> better but still bounces about 5% of full scale. (I probably should have
> waited a few minutes before making the video.)
> Any ideas what could cause this?
> <>
>
> I could not get adjustments to make meter read full scale, I found C203
> and C 205 in the first impedance converter defective, measuring in low ohms.
> After replacing both caps, unit calibrated as it should, but then has
> this meter bounce. Power supply ripple is well within tolerance.
>? ?A clue may be, the bounce is only on 0.001V, 0.003V, 1V, and 3V
> ranges. This surprised me and I checked 3 times just to be sure 0.01V,
> 0.03V, 0.1V, and 0.03V are all stable.
>? ?????????????????????????????? Thanks, Mikek
>
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Re: HP 400E sticky needle
I wonder if any members have made scans of various meters wich could be of value to others with badley damaged scales?
Could they put them on our site?
Cheers Garth.
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Re: HP 3400A, After replacing two bad caps, I still have meter bounce on some ranges.
Perhaps poor/dirty switch contacts on range switch if only on some ranges, but I don't think so. The 0.001V and the 1V are the same signal level out of he impedance as are the 0.003V and 3V ranges. Is the bounce much worse on the 0.001V range than the 0.003? Check and make sure it's not slightly noticeable on the 0.001V range. Not likely that those particular range pairs would be the only contacts bad on the portion of the range switch before the Impedance Converter so something within the A2 module.
John KK6IL
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On 9/21/2022 5:27 AM, Mikek wrote: This video shows worst case meter bounce, after warm up it is a much better but still bounces about 5% of full scale. (I probably should have waited a few minutes before making the video.)
Any ideas what could cause this?
<>
I could not get adjustments to make meter read full scale, I found C203 and C 205 in the first impedance converter defective, measuring in low ohms.
After replacing both caps, unit calibrated as it should, but then has this meter bounce. Power supply ripple is well within tolerance.
?A clue may be, the bounce is only on 0.001V, 0.003V, 1V, and 3V ranges. This surprised me and I checked 3 times just to be sure 0.01V, 0.03V, 0.1V, and 0.03V are all stable.
?????????????????????????????? Thanks, Mikek
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Re: 8660C restoration attempt
Hello again
Some updates -
Hz and SWP keys are now fixed. Not so easy, have to file the stud after glue to ensure proper slide.
Seven power supply filter caps are now substituted with no significant improvement on ripple. Great news ??
The freq drift still there. I¡¯ve observed that the drift isn¡¯t only 5.9 MHz, but also 3 or 9 or 12 MHz, always multiple of three. ?Different drift values happens when restart the unit. It gives me the feeling that it jumps from loop to loop and that those loops are 3 megahertz.?I also think that on one occasion, with a low frequency, the output was ok, but I'm not sure, I have to try more times. The horrid skirt below 100 Hz of RBW is still there with any freq input. I¡¯ll try to mess more time with it to extract more reliable info about this.
Tried sweep function, it clicks and moves but sometimes the whole signal disapears or only few harmonics are present.?
86634A phase modulator doesn¡¯t produce any variation in the wave, so maybe it¡¯s faulty too.
I¡¯ll buy the artek manuals to keep pulling the string¡
Regards,
Ruben
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Any interest in HP871xA/B/B firmware modification for enabling options?
Something that I have wanted to do for years was to reverse engineer the HP Unix firmware for these model network analyzers such that installing the firmware would automatically enable all options, including vector capability.? I realize that many have done this by yanking the eeprom and setting the enable bits, howevre with a firmware update, this would no longer be necessary. Therefore, this firmware mod offers nothing new if you have already enabled the options via the eeprom. This might be attractive to those who do not wish to pry open their analyzer and/or don't have access to a device programmer.? I've accomplished the mods for the latest firmware versions for the A,B and C models.
My question is whether there is sufficient interest in me posting the archived firmware to the 'FILES' section?? My guess is that most people have already made the eeprom mod and will not need this patched firmware version.
take care -
Jim
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Re: 3335A - extender cards
I can second that - I created an extender for working on my 83522A
The slots in the edge were cut by PCBWay as part of the board construction - Works well with the keyed cinch connectors in the SigGen.
TonyG
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Re: HP 8569B Contact Fingers
If you are looking for the exact dimension finger stock, try .
Greg
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Re: 3335A - extender cards
I created a set of Eagle PCB files for HP compatible riser cards that i¡¯m happy to share. I¡¯ve had a couple of sets made at PCBWay and they work well.? The stock PCB is quite wide but they are easily cut down with a Dremel or saw to the required number of tracks and the edge connectors are widely available at a reasonable price.
Regards
Tony
On Wed, 21 Sep 2022 at 14:47, Radu Bogdan Dicher < vondicher@...> wrote: Hi all,
Anyone willing to loan such risers/extender cards? Or provide some direction on building them??
I am located in Southern California, but would be happy to cover shipping both ways, or/and make it worth your time in some other way.?
Thank you,
Radu.?
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Hi all,
Anyone willing to loan such risers/extender cards? Or provide some direction on building them??
I am located in Southern California, but would be happy to cover shipping both ways, or/and make it worth your time in some other way.?
Thank you,
Radu.?
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Re: Suffering from RIFA anxiety!
I did look at several pix. Yup ugly. But in the last pix did you notice the cracked resistor above the RIFA? It appears to have overheated. Regards Paul WB8TSL
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Re: Suffering from RIFA anxiety!
The black stuff is a sticky, tar-like substance. It proved quite readily soluble in alcohol.
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HP 3400A, After replacing two bad caps, I still have meter bounce on some ranges.
This video shows worst case meter bounce, after warm up it is a much better but still bounces about 5% of full scale. (I probably should have waited a few minutes before making the video.)
Any ideas what could cause this?
I could not get adjustments to make meter read full scale, I found C203 and C 205 in the first impedance converter defective, measuring in low ohms.
After replacing both caps, unit calibrated as it should, but then has this meter bounce. Power supply ripple is well within tolerance.
?A clue may be, the bounce is only on 0.001V, 0.003V, 1V, and 3V ranges. This surprised me and I checked 3 times just to be sure 0.01V, 0.03V, 0.1V, and 0.03V are all stable.
?????????????????????????????? Thanks, Mikek
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Re: HP 8569B Contact Fingers
Any chance you can share the source of the EMI gasket material?
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Dave McGuire
Craig Petersen
RubenRubio
Grant - W7GTM | WRKH263 | DMR: 3204339