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[email protected]> wrote: True.

Hello In the last months I've been playing with a HP 8350A + 83525A that probably had a uncontrolled impact with something. After replacing a 7426 on CPU board and rebuilding most of the B.West

jmr, I appreciate the offer, but it won't be necessary, thanks all the same. Now I know where I went wrong the dip is readily visible. I just need to take more care with my coil-winding technique in

Hi, have you read the thread " *Help request - how to test an HP8350B RF plugin YIG* " It was an unexpected problem in the PCB's sockets, check that too. John.

Yes, pretty much. The first thing to remember is that mailing lists have nothing at all to do with the web, web servers, web sites, or web browsers. It's an email address that you send an email to (by

it might actually be better to eliminate this one, I already have a couple responses on the other posting I have, and nothing here, except for you letting me know you saw that I had put two listings

I really appreciate it Richard. ?Nothing wrong with the meter, can mechanically zero it no problem with the small adjustment screw. Once the mechanical zero is that the meter is pretty much Dead on

Okay, I really appreciate it Dave. ?So what’s the difference really? Do they kind of function the same, but each message and response puts an email in your email account? Thank you again, Dan

I'd like to extend the power-off memory retention period of my HP 8753B from a week or two (it's original supercap) to "forever" (at least a very long time). Would it be possible to replace the

No problem. I saw the two messages in the moderator queue and it was pretty clear what happened, so I just put both through not knowing if you'd have a preference as to which one went. Keep in mind,

Looked at the schematic, which I should have done before replying. R-126, the hum balance, is in the filament line. The 10 Hz signal is described as a beat note on the output of the DC amplifier. I

I have not worked on a 412 for many years. Is it possible the hum balance is NOT power supply hum but the residue of the chopper?

I apologize, I have a duplicate thread. I didn’t realized the post had to be authorized before being posted. It can be deleted, use this thread for help. Thank you, Dan

Hello all, I am finishing up on a restoration of a HP 412A VTVM. ?It’s quite accurate from the get go after the restoration. I replaced every capacitor minus ceramics, I replaced pretty much every

Hello all, I am finishing up on a restoration of a HP 412A VTVM. ?It’s quite accurate from the get go after the restoration. I replaced every capacitor minus ceramics, I replaced pretty much every

Yves, Just a small additional update. I'm pretty convinced now the owner before the guy I got it from was already trying to fix this same issue. (I bought it from a guy who had bought it as broken but

There is no limitation for 8510C version as I know.

OK, so we both have the same firmware. I have both 8340B and 8341B with the same firmware. Do you maybe know what is the highest 8510C firmware version compatible with that 1AUG1986 for 8340/1B ?

1 AUG 1986

Dmitrij, Mine is also 2650 serial number. Which firmware version you have?