Hi!
First post here, so I thought it'd be a good idea to take some inside photos of an HP 5386A frequency counter I scored recently on eBay.
Also, I'm curious if anyone here has a similar counter with the "Option 004" OCXO timebase?
Higher resolution images are here:
HP 5386AMost of the ICs/caps have a late-'87 datecode, the TCXO has '8802' stamped on its side (but I'm not 100% sure that's a datecode), so I think it's an early '88 unit. Despite the age, the whole instrument looks really nice and clean.
I didn't have the confidence to open up the RF shield on the 3 GHz frontend, sorry... :)
Edit: Found the
service manual on Keysight's homepage.
It mentions on page 2-4 that the standard oscillator can be replaced by the "Option 004" OCXO. The HP number is 0960-0636, I couldn't find any further info about it. Does anyone have an idea if a modern ovenized oscillator can be installed there?