RC KC5WA asked: On pg 28 right coluum 2nd step: checking AC measurements using DMM ~~~~~~~~~~~~~~~~~~~~~~~~~~ Should an RF probe be used. Instructions do not state either way.
--------------------------------- No. The oscillation you are checking for would be in the normal a-c range of your DMM. That's why the instructions say to probe those points with your DMM in the 200 to 300 millivolt a-c range. RF probes rectify the signal and provide a d-c level for the meter to indicate. Most RF probes have resistors in them to produce a d-c reading on the meter equivalent to the RMS voltage of the RF signal - assuming a good sinusoidal waveform. Ron AC7AC _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
