AN/PRT-4A and An/PRR-9
is a portable radio set, consisting of 2 parts: transmitter and separate receiver. The
transmitter is held in the hand, the receiver is attached to the helmet. Data that could be found:
- Transmitter AN/PRT-4A: (carried in the hand or on the belt.)
Frequency range: 47 ... 57 MHz, 2 fixed crystal channels, FM
HF-output: 200 mW.
6 / 25 inches, put together / expanded.
Battery- Type: BA-399 U
- Receiver AN/PRR-9: (to be fastened on the helmet)
Frequency range: 47 ... 57 MHz, 1 fixed crystal channel.
Antenna: 18 inches.
BA-505 U (in the set I have here).
Sound is led to the ear either through a horn or by an ear plug.
PRT-4 / PRR-9 is a "Squad Radio", a small hand held unit for very local communications. The
collection shows all American Squad radios from their beginning (1941) to 1986.
You may also read the article by Alan Tasker :
"U.S. Military Portable Radios"
For Alignment see:
Indicator, Channel alignment ID-1189/PR
The AN/PRC-88 is known in two versions:
- Short history:
- Developed in 1964, it came to Vietnam in 1967, and shortly after was found to be not fit for engagement.
The Navy built the two parts in one housing and called it
(for more pix see the gallery)
The version shown here has one channel, no channel switch and one crystal;
The better known version has two channels, two crystals and a channel switch like AN/PRT-4A.
It was replaced by the PRC-68.