This may interest some of you: https://www.youtube.com/watch?v=niBGkqlh2XY Alan Wolke's presentation for NJARC. "It covers the basic controls and operation of an analog oscilloscope (the first 50 minutes or so), and then how you would setup the scope to measuring the signals in various locations in a typical antique AM radio (staring about 52 minutes in)." Mike Loewen mloewen@cpumagic.scol.pa.us Old Technology http://q7.neurotica.com/Oldtech/