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Leon I did look at the other site great pix and thats a nice looking meter. Normally gov stuff is pretty beat up. Suggestion. If the meter is off as little as you say does it make sense to simply use

If you are in 230V country sure I would bet on explosion of RIFA caps in the power supply. Not difficult to repair it, just power supply board needs to be removed from SA. Whe you are in, check also

Don't know that exact model, but could it be mains power I/P filter / Rifa line filter caps?

New member here. I have an HP 8560A? SA which had been in storage for some years. On powering it up recently it worked ok for about 10 minutes, then a loud bang and smoke came out........ not good.

I have the contents of the version 4.04 installation diskette. LINK HERE ( https://cloud.fastshare.cz/share/get/HVbmApM7mWv9ri4ObDxunrISeRtYyNX0W8bTymipUMzkXfP5iBzJPIBCwzB8mBIb )

I’d like to think so Paul. It sure would be nice to have a copy of the appropriate manual though to remove doubt. I also posed this question over on antique radios.com with some photos of the A2

The 1821A is very similar for the reset lamp circuit, the voltages are negative on the base, picture below is from the repair of my 1821A, the lamp had failed in that one. David

Copy/paste didn't work. HP 1821 has almost the same circuit. Ozan ===

HP has almost the same exact circuit with -8.5V in one state (lamp is on) and -11.4V (lamp is off) in another state. Looking at 1421 schematic, few voltages look like typos. Ozan

That's what I kept thinking - especially since everything else that's connected to the base is negative. Could that be a typo? Barry - N4BUQ

-8.8V seems much more plausible, with the emitter -9.4V Hugh Gilbert

If you have the meter and desire the original detailed service manual complete with fold out schematics error correction graphs, theory of operation... Please PM direct. Serials prefixed 416--- xxx hp

Chuck, Thank you so much for that. I couldn't tell if that was a + or a - in front of the base voltage but that shows it clearly as +. Thanks again, Barry - N4BUQ

Yes, there is a process to have "downloadable programs" sent to the 8595E.? I do need to get the program though!

Here's a clean scan of the section you are looking at. ChuckA -- See Early TV at: www.myvintagetv.com

Does anyone have a readable schematic for the A101 board in a 1421A? I have a paper manual on order but until that arrives, I would appreciate finding out the voltages shown for Q109 (Page 5-16,

Is it possible that the unit is late enough that its using a 0 offset opamp and wouldn't need that pot? I did look at the online schematic and do see what your talking about. But maybe they were not

Hi The HP 8595A have a card reader at front,and need hardware option 119 when used with NF personality DLP. Hardy Fra: [email protected] <[email protected]>

Hi You are correct-this analyzer must have hardware option 119(noise fgure) for use with 85719A.Its not difficult to transfer this program via gpib. Regarding the expensive ram cards used for this

Thank for the info. I have sent off an email to Carleton University but also still searching. :) Jared