Products > Test Equipment
HP 8753C sampler replacement
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W4PJB:
I just picked up an 8753C, and unfortunately, the sampler card for Port "A" is DOA. I verified this by swapping the card to the "B" port and the problem followed the card.

I've looked through the service manual and it's a bit unclear if the 8753C needs calibration after replacement of this card, or only the A and B models. Does anyone have experience replacing one of the A4/A5/A6 cards in an 8753C that could shed some light on this?

If not, it's going back to the seller. Which I'd hate to do as it's a super clean unit that already has an LCD upgrade, but there's no way I can justify paying for a full calibration nor do I have the equipment to do it myself.

Thanks!
KE5FX:
Strongly doubt there is any reason to recalibrate anything after swapping the sampler card.  Any additional errors will be taken out when you calibrate as usual.

That's a nice display, I'd keep it. :)  The LCD is far better than the crappy color CRTs they used.
W4PJB:
Well hello in this thread! I'm keeping you busy this evening, aren't I?

I much appreciate the reply. My thoughts are, even if it's a bit out of CAL I'm sure it will still be far good enough for hobby use. I'm not using it to land on Mars.

Thank you for backing that thought up.
KE5FX:
I'm subconsciously seeking distractions from what I'm trying to troubleshoot, I guess...  :-DD
Bud:
You can send a PM to Dr. Joel Dansmore (user Joel_Dunsmore), the designer of the 8753C. Joel hangs out in RF and Microwave subforum.
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