[Milsurplus] Wanted info: RU-1,RU-4,CX403

[Ralph Cameron]

I've had a local request for technical info on WWII intercept receivers type RU-1,RU4 and CX403

The CX403 was in use in Britain as an experimental SHF intercept receiver. It was thought to be a derivative of the RU-1 and superceded by the RU-4. 

The RU-1 was a narrowband, frequency scanned receiver with rotatable yagi antenna. The CX-403 was a broadband receiver using similar antenna. 

Does anyone have further info on these sets which came out during WWII. 

Ralph Cameron
VE3BBM