-- '' Onward-to the main components of the PRC-25, the AN/VRC-53 and the AN/GRC-125. RT-505 A batch or two of the CX-4655/U special purpose cables that tie the RT-505 to the amplifier-power supply were cut a little short when they were made. And, when you connect the components, that sharp U-bend pulls just enough cable to make the connectors less than waterproof. So-o-o-o, if you can spot wiring when the cable's bent, a loop or two of insulating tape at the base of the con- nector should keep out moisture. It should serve in an emergency, till you can get a new cable. Finding a Joe who's mad enough at an AN/PRC-25 series radio set to badmouth it is about as easy to do as sitting on a bamboo spear tip. Like, when the geniuses back at the drawing boards dreamed up those little gems, they must've had operators and repairmen kibitzing over their shoulders. For the operator, the sets are almost as uncomplicated as using a pocket portable. So a few cautions, some PM palaver and an inside word or two on a couple' short-term shortcomings should keep you communicating. 2 A ~'I~i The VI (2DF4) tube, FSN 5960-892-3689, and trans- mission range depend pretty much on each other, so if you lose range, the tube is a good suspect. Fact is, you might test the tube periodically just so's you'll be sure you have range when you need it. - ji 'A; i MORE lYa