K6JCA

[Part 1 can be found here ]  In Part 1 I evaluated a Class E/F amplifier using a center-tapped transformer to supply power to the d...

[Part 2 can be found here .]  I've recently been thinking of replacing the Johnson Ranger which drives my 813 AM transmitter with ...

UPDATE:  24 April 2012.  Just updated the schematic, which had an error (the source pin of the MPF102 oscillator should connect directly to ...

I came upon a pair of these radios (plus an AC power supply) a few months ago while visiting a ham-radio store that specialized in older, us...