HP 8360-Series Sweeper CLIP soon available on KO4BB
Dear all,
I just uploaded this (very rare) manual to KO4BB's website. It now needs to be verified and then will be available for download.
So all owners of a 83620 and variants will have this finally on their hand.
A big thanks to everybody that contributed!
If you find a mistake, please let me know.
Cheers,
Martin
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8594E CAL: SPAN SENS FAIL
I have an 8594E spectrum analyzer that gives CAL: SPAN SENS FAIL when self-calibrating.
I went through the internal service-diagnostic routines and?
passes:? 2V reference detector, ground reference detector
fails:? main coil driver, FM coil driver, sweep ramp, 10V reference detector, -10V reference detector
The service guide points to the A7 Analog Interface for all of these failures.? So...simple enough, I just need to swap A7 boards.
And I did, and nothing has changed...exact same fails.
So either I got an A7 with the exact same failures as my original, or something else is actually wrong.
Any suggestions would be greatly appreciated!
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Re: Request HDD image for Agilent Infiniium DCA 86100C mainframe
Hi Alex,
Thanks again for the image, I'll try it as soon as I get home.?
What program do you recommend to transfer the image to the HDD?
Best regards?
Maurizio?
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Re: Request HDD image for Agilent Infiniium DCA 86100C mainframe
On Mon, Apr 29, 2024 at 10:07 AM, maurit wrote:
maurinot@...?
Hi Maurizio, I sent you the link. So, and this is my e-mail - aleksandr.tarasov.br@... if someone can send me the 86100C image.
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I appreciate the link to the article on the FRAM modification. I have a 54501A headed this direction DOA and once the power supply is sorted I suspect that NVRAM will be an issue. That article saves me a bunch of time chasing data sheets.? Dave
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On Apr 29, 2024, at 6:29?AM, paulswed via groups.io <paulswedb@...> wrote:
? Thanks for sharing the NVRAMs have been a issue for a long time. Particularly in Tek 2465 scopes. The glitchhawk link seems to do a really great job of showing how to outfit a new battery. At my capability. Thanks Paul
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Thanks for sharing the NVRAMs have been a issue for a long time. Particularly in Tek 2465 scopes. The glitchhawk link seems to do a really great job of showing how to outfit a new battery. At my capability. Thanks Paul
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Re: Request HDD image for Agilent Infiniium DCA 86100C mainframe
Hi Alex,
I’m very interested in your Win98 HDD image.?
My 86100A lost some program files.?
thanks a lot.?
Maurizio - maurinot@...?
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Hi..
There is plenty of stuff on the interweb, showing how other people managed to remove the battery "Hat" of a NOVRAM, and wired in an external cell.
Check these links out...
NVRAM to RAMTRON FM18W08 FRAM replacement.
New external battery for NVRAM
Reworking the DS1287 / DS1387 RTC chip
Dallas Semiconductor DS1387 Module Rework/Battery Replacement
All the above links checked and are working.
"Have Fun"!
73.
Dave 'KBV
--
Sent from a Micro$oft free zone:
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Re: HP 3585B Spectrum Analyzer How to start diagnosing "No Horizontal sweep" problem
Check your unit. There are apparently two different setups for the horizontal oscillator/HV section. One version has the oscillator and flyback all one one board, which is located under the shielded HV box. Mine was different and I think the later rev. The oscillator section was on one board, with the flyback/HV portion being a separate board which was under the shielded HV box. The fuse was on the oscillator board. If you have to do any repairs to the HV supply you’ll have to check and possibly reset the CRT high volts. The value is written on your flyback and that procedure is also in the SM. Bear in mind, it’s around 4KV so it can kill you dead.?
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HP 5356 B or C frequency converter for 5345A parts needed
I am looking for a 5356B or C parts unit.? Working condition not important, but I'd like the connector and possibly the case to be recoverable.? Don't care about the cable.
Anybody have anything they want to get rid of?
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Re: HP 3585B Spectrum Analyzer How to start diagnosing "No Horizontal sweep" problem
There is a fuse inside the unit on one of the boards. It supplies 12v to the horizontal oscillator. If your flyback is bad, that fuse will blow and you will have no display on the CRT. The board is accessible from the bottom so you will have to flip the unit onto its side to access it. I took my flyback out and ring tested it to verify. It failed. I think a good one has around 300 ohms DCR on the HV winding with smaller and smaller values as you move down the taps from the HV to the bottom. My bad one checked around a meg or more.?
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Re: HP 3585B Spectrum Analyzer How to start diagnosing "No Horizontal sweep" problem
Do you have an XY monitor? There is video out connectors on the rear of the unit which you can use to obtain video. You can also probe those with an oscilloscope to check for a video waveform if nothing else. Iirc the rear XY signal is a separate signal chain from the main signal driving the display.
I have the 3585B and I use it very frequently. It’s a very good SA for doing work below 40m. I’ve had to do two repairs to mine so far. The display board, A67 I believe, had shorted tants on one of the power rails, the -15v I believe. That was an “easy” fix. The second repair occurred when the flyback transformer suffered a short on the secondary side. That one was a bit more painful as it required a bit of cash for replacement parts. Although that failure was not terminal as, like I mentioned, I had video from the rear ports making it somewhat usable albeit without the graticule. The manual has very good troubleshooting guides. I’d recommend getting familiar with it.
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Request HDD image for Agilent Infiniium DCA 86100C mainframe
Hi guys!
Can anyone share the disk image for the 86100C?
This mainframe runs on Windows XP.
I have a disk image for the 86100A based on Windows 98 and I'm ready to share if anyone needs it.
Alex.
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Re: Requesting HP 33120A VFD
yeah I already found some on?eBay for the entire front panel assembly.? I was hoping someone?had just the VFD to spend a little less money. (Believe or not but I had already?change the front panel assembly years ago, that time it fells from my workbench?table and broke the VFD)
Il giorno dom 28 apr 2024 alle ore 20:15 Ctron5890 via <apolentini= [email protected]> ha scritto: Keysight lists this part as obsolete and cannot be purchased. Keep a lookout on eBay and pick up a front display assembly or low cost parts unit (hard to do these days).?
[rant on] Keysight has obsoleted more and more parts + restricted parts to service only. They want us to pay 3X the cost of a unit for them to just put eyes on it by their service techs. Just pushes loyal users away in my opinion [rant off]
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Re: Requesting HP 33120A VFD
Keysight lists this part as obsolete and cannot be purchased. Keep a lookout on eBay and pick up a front display assembly or low cost parts unit (hard to do these days).?
[rant on] Keysight has obsoleted more and more parts + restricted parts to service only. They want us to pay 3X the cost of a unit for them to just put eyes on it by their service techs. Just pushes loyal users away in my opinion [rant off]
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Re: 5342A: sometimes counts, sometimes not
Acording to service manual, divide-by-N circuitry are ok. Found faulty component: U2 in A10, a phase detector (Motorola MC4044P). It has two inputs, divide by N signal which is present and changing period acording to CF in manual mode; and a reference input, fixed 50 kHz pulse, ok too. It's outputs are intermitent, so I think it is the faulty component which prevents A9 to sweep the synthesizers properly
I'll order new IC and try it out
Regards,
搁耻产é苍
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Re: 8711B tantalum disease
One was a 20 volt part on a 15 volt rail.? The other was a 10 volt part (!) on a 12 volt rail.
I replaced both with 35 volt parts.
Nice that the power supplies have current sensing and shut everything down when a tantalum shorts.? So many pieces of equipment don't have that and end up burning holes in boards.
Peter
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On 4/28/2024 12:56 PM, Roy J. Tellason, Sr. via groups.io wrote: On Saturday 27 April 2024 08:24:59 pm Mark Weedon wrote:
Peter,
I agree - tantalums are a pest.? Perhaps the problem isn't the tantalums but our fascination with equipment from the dodgy tantalum era.? We can replace tantalums, dried electrolytics, leaky backup batteries etc but who really wants to cure that fascination?
The tantalums exposed to immediate voltage at turn on are the most likely to fail. Those in timing circuits, charged via a resistor seem to be OK. My impression is that the ones that fail are those that have voltage applied to them which is close to or at the part's rated voltage. One instrument that I'm familiar with used a *lot* of parts rated at 25V in a circuit that might under some conditions put 30V across them. Yes, there were failures...
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Re: 8711B tantalum disease
On Saturday 27 April 2024 08:24:59 pm Mark Weedon wrote: Peter,
I agree - tantalums are a pest.? Perhaps the problem isn't the tantalums but our fascination with equipment from the dodgy tantalum era.? We can replace tantalums, dried electrolytics, leaky backup batteries etc but who really wants to cure that fascination?
The tantalums exposed to immediate voltage at turn on are the most likely to fail. Those in timing circuits, charged via a resistor seem to be OK. My impression is that the ones that fail are those that have voltage applied to them which is close to or at the part's rated voltage. One instrument that I'm familiar with used a *lot* of parts rated at 25V in a circuit that might under some conditions put 30V across them. Yes, there were failures... -- Member of the toughest, meanest, deadliest, most unrelenting -- and ablest -- form of life in this section of space, ?a critter that can be killed but can't be tamed. ?--Robert A. Heinlein, "The Puppet Masters" - Information is more dangerous than cannon to a society ruled by lies. --James M Dakin
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HP3336C micro controller board
Is board 03326-66516 a replacement/upgrade from board 0336-66505?
Thanks
--
Joe White
KW4YW
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Re: Agilent E4404B Spectrum Analyzer With Dead PSU Repair
Update, the unit powers on. But now is showing other errors.
I will create a new thread
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Martin Rickes
maurit
RubenRubio
