I have never seen signs of either one of the dual place control heads and I have been pursuing one of them for years, though they were documented in the article on my website about the introduction of both sets.  Photo below.  I would never say they were not fielded, but they do seem do be as rare as hens' teeth.

- Mike  KC4TOS



On 7/24/2022 2:30 PM, MARK DORNEY via MRCA wrote:
Hello everybody,
     The GF/RU Radio is well on it’s way to being completed.  My attention is turning to an ATB Transmitter I’m working on. Anybody ever see and OPERATORS Control box CRV-23313 for the transmitter? It’s mentioned in the manual on page 35, and shown in figure 29 of NAVAER 07-5Q-2 dates 23 Feb, 1942. Was this second Control box for the transmitter ever produced?  I know the ARB Receivers had two control boxes for dual position, but the ARB Receiver was also more common than the ATB Transmitter, so maybe the Operators Control box was not produced?  Thoughts. 

Mark D. 
WW2RDO