C-45
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Built as a replacement for the Wireless Set NO.19, the C45 and C42 were a good step forward. Whilst not synthesized, there are a good, solid set that saw widespread use throughout the Commonwealth.
The station consists of the transmitter/receiver unit, vibrator power supply and antenna tuning unit. The antenna tuning unit is mounted to the body of the vehicle and serves as a base for a whip antenna. Audio junction boxes route audio around the vehicle allowing intercom usage. There was also a power distribution panel for 12 or 24volt distribution.
The set has a crystal calibrator for determining correct operating frequency. The receiver has a squelch circuit.
The system was to designed only to operate with an 8 foot whip antenna or an elevated aerial on a 27ft telescopic mast.
The receiver is a dual conversion superheterodyne
A-510
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The A-510 is a miniature tactical HF transmitter receiver man pack set built by Amalgamated Wireless Australia (AWA) in the mid fifties. The set was completely designed and built in Australia and it is reported that the radio set's prototypes had been tested under fire (actual combat) in Malaya. Compared to sets then in use (the English made WS No.68) its around half the weight at 17lbs, and it's batteries have half the weight yet twice the life, it provides double the frequency range of the existing set.
The A-510 is definitely known to have served with distinction along side Australian forces in South Vietnam, until it's replacement by the U.S. Made PRC-64 beginning in late 1965. It was not completely replaced in all avenues of military service until the advent and widespread fielding of the PRC-F1 series in the early seventies.
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AN/PRC-25
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The AN/PRC-25 is a compact, lightweight, tactical VHF, solid state man pack radio set. Prototypes of this set were initially tested in 1959. After some modifications, initial distribution began in 1962. It is reported that more than 130,000 sets were produced.
The ANPRC-25 was the main 'Aussie' communication hardware in the field. Each platoon had a dedicated radio operator (Signaller). When the Battalion, during its first tour, arrived in Vietnam with not enough radio sets, it required some members to beg, borrow, or steal from American units.
Specifications:
Frequency Coverage: 30 to 75.95 MHz in 2 bands
Modulation: FM
RF Power Output: 1 to 1.5 Watts
Range: 5 miles (8km)
Power Requirements: 12.5 VDC (electronics) and 3 VDC (tube filament)
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PRC-F1
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A HF/AM/CW/SSB, backpack transceiver fully designed and built in Australia, the PRC-F1 (originally designated A-512) operates from 2-12Mhz in 1Khz steps for a possible 10,000 channels. RF power out is rated at 10/1 watts PEP AM/USB, 5/1 watts CW (high/low power settings). The unit requires 28vdc, provided from a recharagable battery pack, with a typical current consumption of 550ma (transmit) 35ma (receive). Size 32cmw x 12.7cmh x 29.4cmd, weight 14lbs 11oz, approx 20 lbs with accessories and operational backpack.
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