The RS-6 radio set was developed for the CIA in the early 1950 time period. It was designed as a 4 unit radio transmitter and receiver set that came in a wooden box. Offered now is one crystal controlled transmitter with fold out key, one tuned receiver, and one power supply. A filter unit that is not necessary for operation is not included in the package.
This set was built in such a way that the national origin would be hard to determine by an enemy. The antenna tuner in the transmitter could load up a a random wire and was very effective allowing any length conductor to be used as an antenna.The power supply works on several different AC line sources including European 50 Hz and also 60 Hz. In addition the power supply will work on a number of DC voltages. When issued by the CIA, the radio came in a wooden box with all four sub units contained in the box. This radio covered a portion of the HF band.
There are a couple of good references to this set on line, so I will not be repetitive here. I will pay any difference if it should cost more. The item "RS-6 Radio Transmitter Receiver CIA 1956 Clandestine Spy Ham Radio Crypto Museum" is in sale since Saturday, October 13, 2018.
This item is in the category "Collectibles\Militaria\Surplus\Radios". The seller is "k4mog" and is located in Powder Springs, Georgia. This item can be shipped to United States.