[time-nuts] Anyone familiar with SR-620 repair?

Robert LaJeunesse rlajeunesse at sbcglobal.net
Fri Mar 23 21:15:44 UTC 2012


HP once made a kit with DIP logic clip, logic probe, logic pulser, and current 
tracer. Pulser and tracer made finding shorts pretty easy. For the SR-620 you 
could disconnect the regulator and inject current pulses there, follow them 
around with current tracer. The same basic trick works given a bench type pulse 
generator as the injector, following the current with a chopped down magnetic 
tape head feeding a scope (or spec analyzer?). Been there, done that. Made my 
own RF type probe with just a small coil at the tip. Have the HP logic kit as 
well.

Bob LaJeunesse


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