*S 406 S/36-2
* The transmitter was very solidly built.
* The internal housing was made of a durable ceramic material.
* The transmitter had 3 stages:  an exciter, a splitter, and an antenna unit.
* The transmitter could send Morse Code (A1 and A2 only), no voice.

Photo by Bruce Culp
Photo by permission of Stg. C.D.V.&T.