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Re: HP 3325A gen synth AMPL CAL 2 self test fail


 

Hi Jon,

Yes, I'm in Hungary, do you need anything from here? :-)
About the ribbon cables, I'm not sure if contact cleaner is sufficient. I am talking about the flat cables that slide in the socket. I think HP later replaced them with normal IDC connectors.
Although I saw oxidation on the cable ends, it seemed to me that the socket can become loose and not grab the cable enough. I had a lot of problems, so finally what I did was to remove the sockets and replace them with a simple pin header socket. The cables could also have been replaced with normal ribbon cables, but It was simple to just solder a pin header to the cable ends. Since the flat cable is somewhat rigid, it basically meant the soldering could be done very quickly and easily, definitely much less work than stripping and attaching normal ribbon cable.
Of course, the most elegant solution would be to use idc connectors, but I had all these in components in my drawer. Once I did all the tedious work of removing the old sockets and doing the soldering, I had zero problems later. I can't show you pictures, because I sold my 3325A when I got a fully optioned B version, but never heard any complaint from the buyer, so I guess it worked.?

Szabolcs

Froggie the Gremlin <jonpaul@...> ezt ¨ªrta (id?pont: 2024. febr. 19., H, 18:11):

Dear Szabolcs, nice to have your notes, are you in Hungary?

I am sure it's as you said just components drift.

?I am aware of the poor ribbon connectors, have used contact cleaner and r¨¦plugged them all.

So,? the? error in amplitude is just a few %. Agree on performing the CAL AMPL proceedure.

Will report result soon

Jon





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