Counting on the HP 5328B

[jrharley]

TGIF!, for those of us still doing a day job! 5328B progress to report.

We are now counting on the A input! Not without curious symptoms though. It does seem to be input level related at the moment. Shout out to Tony_G for the comment about that.
Attempting the first maintenance check, which specifies an input level of 25mV rms, doesn't kick it in. An input level of 150mV, does kick it in, and it starts counting............usually.

I don't have any feel whatsoever as to how miss-calibration might affect what I'm working through, but this thing HAS to be really out of whack. On a related note, I still need to get back to what appears to be a dead shorted trimmer cap on the A14 board. I'll examine it out of circuit and see what I can see. Hard for me to see how that's a good thing, so we'll see how we go with it.

It's not at all clear to me whether or not my solder re-flow blitz enabled this development, but I'll take it!
Photo of some magnified solder joints attached. - JRH