Note
QST, Jan 1956, p. 126.
QST, Mar 1956, p. 111. (Photo)
Walter Ashe catalog 1957 (probably issued in 1956), p. 12.
QST, Jan 1959, p. 169. (Good information)
CQ, Oct 1964, p. 104.
QST, Apr 1965 p. 136.
The TR-20/50 used a 6360 Class C final plate modulated by a pair of 6AQ5s in Class A. The final operated straight through on 6 meters at 20-25 watts input. It had an RF bridge circuit and rectifier for monitoring output, and a speech amplifier and modulator. The TR-20/144 model added a buffer/multiplier stage for operation on 2 meters, and the TR-20/220 covered 1-1/4 meters. All transmitters in the TR-20 series came complete with tubes and crystal.
