RTX mod. AN/PRC-90 - (U.S.A. 1970) - Rescue portable radio set utilized by USAF pilots from Vietnam conflict, successor of the old AN/URC-4. Operative frequency UHF, 3 channels, AM, 243,0 MHz (voice and CW tone) and 282,8 MHz (voice), crystals controlled, RF power 1/2 watt, battery 14VDC from 1568/U mil- type, weight: 907 g (including battery), waterproof.

AN/PRC-90 rear vision