[Milsurplus] B 58 antenna tuner

[Boeing377]

Not certain it is correct but an old retired USAF radio tech told me (back in the 70s) that the first B 58s used a Univac ERA antenna tuner which was in a pressurized long semi cylindrical container. It had a vacuum variable and fast turning rotary inductor. Powered by 400 cycle AC. He couldnt recall an AN or CU designation, he just remembered it as the ERA. He said it used tubes and was very reliable. Said it tuned much faster then the 490Ts. He thought they upgraded to a different tuner later. He was stationed in Texas. 

Seemed odd to me because the ERA was really outdated, had been used in B 36s and B 52s with the ARC 21 and ARC 65 SSB xcvrs.

Mark