The PRC-25 Field Radio
The most commonly used communications device in Vietnam was
the PRC-25 radio. It had a range with the flexible antenna of
about 3-4 miles in the flat land of the delta. With different
antennas that could be extended to about 20 miles, maybe even
more on a good day. All the controls were mounted to the top and
the battery was contained in a compartment on the bottom. There
were two places to attach handsets and two knobs to set the
frequency and a knob each for volume and squelch. The antenna
attached to the top too. There were handles at each side.
It was water proof but the handset wasn't. It had to be held
up when crossing waterways or arm pit deep mud. Normally it would
hang on a ring high on the shoulder strap. With the volume turned
up the sound would carry far enough for someone a few feet away
to hear. The coiled cord was long enough so that a man walking
behind you could use it.
It was an FM signal that overlapped with some of the civilian
radio and TV channels. We would on occasion find some civilians
with a radio tuned into our frequency. They would be
"detained" for that.