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The TG-5-B

The TG-5-B seems a bit over designed for a telegraph set, but this is the way they built things in those days. The key attached to the front cover is a J-41-A (shown in detail below). The two orange stamps on the cover are a Signal Corps acceptance stamp and a Fungus Protection stamp. I assume the set was used in a wired, or landline, field telegraph network.

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Here is the circuit diagram, which is glued to the inside of the lid.


This special version of the J-37, called a J-41-A is furnished with an extra terminal on the right side. The connecting straps are arranged such that there is continuity between the two back terminals on key-up, and between the two terminals on the right on key-down.

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