[Milsurplus] Airship radio equipment?

[Nick England]

Howdy men -
A buddy asks "What do you think that transmitter is setting between
the RU-x receiver and the fuselage?"
See photo of the airship USS Macon radio room at
http://www.moffettfieldmuseum.org/photos/showimg.php?file=/Macon/Interior/macon_inside13.jpg

and there's more unknown (to me anyway) gear in another shot at
http://www.moffettfieldmuseum.org/photos/showimg.php?file=/Macon/Interior/macon_inside11.jpg

cheers,
Nick