Hi Don, Thats right, however I recall back in the fifties a friend of mine who had been in the RAF Signals Division during the war saying that the radiation was a myth and the the Metox did a good job for what it was designed and caused the RAF some concern until a higher frequency Radar was developed. A large debt was owed to the captured RAF aircrew who led the Germans astray with stories of the Metox radiation and concealing the latest Radar.