The RBH was the Navy designation for the NC-156 receiver, a 10 tube superheterodyne that covered 300kc to 1200kc and 1700kc to 17mc in five bands utilizing National's famous moving coil-catacomb band switching system. The receiver also features single preselection, two IF amplifiers, crystal...
The Navy RBG-2 was also identified as the CHC-46140 receiver, a general coverage HF, 11 tube superheterodyne that covered 543kc to 31Mc. It is the Navy ruggerized version of Hammarlund's civil receivers HQ-120x and HQ-129x. The band spread dial is calibrated for the maritime HF communications...
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Special typewriters were used by radio telegraphist to transcribe Morse messages onto paper. In the US Navy these special typewritters were known by the slang word "mill typewriters". A special "mill" would typically use 9 point sans-serif capital letters only and have numbers "1" and "slashed 0...
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