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Greetings all, I need to make some room in my lab again (happens too often) , so I have the following equipment for sale: * HP 8566B Spectrum Analyzer with interface cables - $500 * HP 8902A Measuring

Not mine, but I thought someone might be interested https://indianapolis.craigslist.org/ele/7097424406.html Wally KC9INK

I have both of those models as well that I purchased very inexpensively at an estate sale a few years ago and this conversation has prompted me to drag those out and see the operational status of

Not that it means anything but I do see a neon glow from the photo cells and it appears to be glowing bright. It looks as if someone has worked on this thing at some point because wire positions are

Hi Andreas, There is two different Non-volatile/zero-power ram chips in the module. Both have their own internal backup battery. So the battery in one of them is probably bad. I would replace both, as

Hi Matthew, the self test menue has an explicit function that tests RAM and it runs thru without error messages. The problems seem to occur in the nonvolatile memory of the HP54657A module. The

Dave, This looks way better, and might now work, but if it was mine I would clean on it some more. Looking at your hi res photo, there is still some crud around the anode of CR8, around the pin 1 and

Hi Kurt, Thanks for great suggestions. I tried the following on the board and am ready to replace capacitor and start testing. 1) Isopropyl Alcohol and Q tip. Mixed results. 2) Xylene (goof off) is

I've seen reports of bad trimpots on the XY board causing display issues on the 8753A/B. However I had a B with CRT issues and didn't find any bad pots. It did respond well to CRT rejuvenation and I

In the future, clean the boards with 100% alcohol and blow dry with compressed air. Best to wash off with de-ionized water but the alcohol alone will work.? Do a final rinse with the alcohol after

I could help you with that.? Can you tell me the problem?? Is it just the oscillator or the receiver/analyzer or do you not know? George Hnatiuk EMAIL:? ghnatiuk@...

Dave, I do quite a bit of work on IFR service monitors, and have seen this problem many times, both with tantalum and aluminum electrolytics.? I use alcohol and toluene as solvents, and find that I

I'm sorry Michael, I misremembered. Before I looked in the manual, I remembered lamps, of some sort, and CdS photoresistors, and it registered as a choppers. It is actually a Wien Bridge. Three of the

Collective wisdom, y'all. Stay safe...now that Jzonsson de Peffel also got ill, I am starting to worry a bit. To me, he appeared as the pinnacle of a healthy happy strong man... With best regards Tam

The 334 has an Automatic Nulling (A6 board) circuit which uses lamps and a single detector. I see no chopper.

I haven't used it in a while, I've been using a leader LDM-170 but feel more confident in triusting the 334A. First problem is that you can't "Set" anything unless you have an extremely high voltage

Guys, Just in case it helps, the names Marconi Instruments / IFR / Aeroflex / Cobham / Viavi are all historical parts of the same company from 1998 onwards. With regards to IFR, this operation was/is

Hi Roy, /g/Marconi-Test-Instruments I have been getting some good information there. Dave wrote: -- 72 de Dave VE7HR

Hi Dave: If you could post the links you found, that would be great. There appears to be many things associated with the names IFR and Aeorflex Cheers and best wishes. Roy

I didn't mean to sound critical but I think I did, my apologies. The lack of mercury cells is a PITA. Lots of stuff used them and its often hard to find a substitute.