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Hi, I have a HP8924C with R .A.02.02. When I start up the message appears: "cal file checksum incorrect. File reset to default values." I don't have a card memory. How can I fix that? Thanks Molina

Thank you for the reassuring advice as well as the link that allowed me to follow it all the way down to a PDF. I think due to the age of this I'm better off in the long run replacing the entire PSU.

I'd say the same. It is a lot of work, you gotta buy QUALITY capacitors, patience, patience, patience. At least you can buy a revised, remanufactured power supply with full warranty from Amtronix.

Take it from me, recap them all. Or you will be like me and digging back into that PSU in another year or so wishing you had. Plus, its not so hard to remove the glue. A good tug with pliers and it

Yep, that one. Mine did the same thing last year. See this thread

Oliver, I think you're referring to the software to effect the extraction of the cal data from your 8920. That's here in our file section in the "HP8920 Tools" folder:

Hi Oliver The fle is still there /g/HP8924-Family-Spectrum-Analyzers/files/HP8920%20Tools Robert G8RPI.

Hi all, I recently acquired a used 8920A and an 8335, both of which have some minor issues. Since I have some spare modules and board to swap around, I would be really interested in trying the

YES, a bad cap! I fortunately heard back from Amtronix this evening. Not only does he have replacement power supplies available but he actually showed me which capacitor normally goes out. I will try

Yes, you can often get by just replacing the small capacitors on on or two of the vertical boards. I must confess that I’ve done this rather than the full recap of the supply. So far, I’ve been

I am not an expert in service monitors. But I repair a lot of old electronics, and not only in them, but also in my own E8285A, the problem is mostly the same - old tantalum capacitors. I'd begin

I meant to add that Amtronix sells a rebuilt supply with your exchange for about $ 350.? I got one of them about 10 years ago for about $ 250 I think.? ? I later repaired 2 of the supplies in other

Guaranteed to be bad capacitors. Attached is a repair guide for the 8924C from the old groups I downloaded and a list of caps I replaced in a couple of 8924 power supplies a while back. In your

It is probably some bad?electrolytes capacitors in the power supply.? That is a well documented cause of the 8924c and others of the series not coming on.? Many old switching supplies are like

My unit has stayed unused for several years as I have dealt with cancer. I went to check deviation of a a repeater last night and found that it would not turn on. I turned it around to see if there

anyone have the CLIP for the A2 card used in the 8920B/8924C ? This has the variable notch filter option. The one for the 8920A is close but have an issue surrounding the variable filter. The variable

Follow up: well I finally go to test it and it worked OK except I noticed after about 30 minutes it was dimmer. If I kill power and restart it it come back on bright. It never went away totally so

Don't forget to post your results here =) Em 19/04/2021 19:54, William Verstelle escreveu: -- ---8<---Corte Aqui---8<--- https://www.tabalabs.com.br https://tabajara-labs.blogspot.com

Ok thanks I’ll try none first then add if needed. Got chip already mounted on a board today so will try is soon. thanks Guys!

I didn't use them, and it worked... Em 18/04/2021 22:02, William Verstelle escreveu: -- ---8<---Corte Aqui---8<--- https://www.tabalabs.com.br https://tabajara-labs.blogspot.com