"The transmitter was running at 10 watts input and a copy of a 1928 QST design. Hence part of the exchange was "28mopa" meaning a transmitter from 1928 and a Master Oscillator Power Amplyfer, it uses vacume tubes and has about 5 watts output".
I've worked a few "parasets" and even an old CIA radio but:
This is by far, the most unique radio I've ever worked!
This transmitter is a beautiful piece of work!