TN-339
The Radio Frequency Tuner TN-339/GR is a part of the AN/GRC-26D Radio Set.
Reference File
- 11-809-10 Radio Transmitters T-368/URT, T-368A/URT, T-368B/URT, and T-368C/URT, and Antenna Tuning Unit BC-939-B Operator's Manual, May 14,1958 with changes including RADIO FREQUENCY TUNER TN-339/GR AND STANDING WAVE RATIO-POWER METER ME-165/G
TM 11-809-10 1958 (Google)