06-04-2011, 08:34 AM
The sweep rate on mine is from 8-14mS and I typically use 10 as it is easy to sync it to avoid hum effects 'passing by' on the trace. Seems OK to me... the main thing is to choose the pick up point for the scope probe carefully. Some say the top of the volume control but if this is capacity coupled then it can slew the demodulated waveform. I get as close to the detector output as possible which often means a little RF on the waveform. However, a shunt cap of a couple of hundred pF or so cleans this up.
Gary
Gary
