VRC 321

The UK Vehicle Radio Communicator 321 is a vehicle mounted HF radio often found joined by the Selector Unit Radio Frequency (SURF) and Tuning Unit Radio Frequency (TURF) in a three piece assembly. These are more commonly found in the back of Landrovers and many other military vehicles.

Frequency Range

The UK/VRC-321 has a frequency range of 1.5 to 29.9999 Mhz in 100Hz steps, providing 285,000 possible channels for use.

Power Supply

The 321 operates with either 2x12V batteries or with a single 24V or 28V battery.

RF Output and Modes of Operation

This is very similar to the PRC-320 and as a HF radio includes Single Side Band (SSB), Amplitude Modulation (AM) and Continuous Wave (CW) modes of operation.

SSB (voice)
High Power	40 W
Low Power	6 W
AM (voice)
High Power	30W Carrier (30W peak)
Low Power	5mW Carrier (3W peak)
CW (Morse)
High Power	30 W
Low Power	5W

Antennas & Ranges

Here are some typical ranges that can be expected with the different types of antenna:

Antenna	Range
Vertical Radiator	50 Km (SSB)
Vehicle Whip (2.4m)	50 Km (SSB)
Dipole	Near Vertical Incidence Skywave 1000+ Km

Some other compatible antennas include the 2.4m whip antenna and Endfed antenna.