Most instrument PCBs have scores of bypass caps... all in parallel. -John
========= > Shouldn't be too bad, a 10uF cap would have 15 Ohms impedance at 1KHz, > 150 > Ohms at 100Hz, and one could inject at different places on the trace... > away from the big bypass caps. > > Doing the same with DC and a simple multimeter should work too. > > bye, > Said > > > In a message dated 3/23/2012 14:31:42 Pacific Daylight Time, > [email protected] writes: > >> Here is a trick or two that may work: >> >> feed a very small AC voltage with say 1KHz and 10mV into the bad power >> rail. It won't hurt anything. >> >> Then use an old cassette players' magnetic pickup and amplifier to > follow >> the signal to the short. No need for expensive hall effect meters. > > Good bypass caps are near AC shorts. I've not tried it, but am not > optomistic. It would work on stuck signals lines, but not well on power, > IMO. > > > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
