TH-5
The TH-5/TG converted neutral dc signals from a teletypewriter to frequency-shift telegraph signals, and frequency-shift telegraph signals to neutal dc signals for the teletypewriter to print. 20 Hz ringing was provided for ringing and break-in during half-duplex operation. Replaced by TH-22/TG.
Reference Files
TM 11-5805-246-10 and TM 11-5805-246-ESC