THE PYE MILITARY ARMY-RAF MOULD VHF-UHF COMMS SYSTEM Commissioned approximately 1980. Comprised of Low Band Pye Pegasus 18 channel dash mounted mobiles M252 based on the standard Pye Beaver ruggedised FM chassis and painted green. Running about 15 watts to 18 watts output in the 79 MHz frequency band and receiving repeater outputs in the 74 MHz band with 12.5 KHz spacing. They are crystal controlled sets. Also Duplex Talkthrough Pye Pegasus M252 for infill of unserviceable or knocked out repeaters sites in a M.I.V. (Mould Insertion Vehicle) - probably a Land Rover with telescopic mast. Later these were provided with CTCSS modules to stops repeaters opening on squelch noise during lift conditions on VHF. Hilltop site repeaters consisted of VHF-UHF links of R400 series base stations running F406 100 watts output or F402 running 30 watts output on 74 MHz and on 142 MHz / 149 MHz as links between sites. UHF link base stations were F414 - T414 5 watts output links on 421 MHz - 433 MHz offset 12.5 KHz from the 70 cm amateur radio repeaters system. Philips FM900 Low Band 110 channel 12.5 KHz 25 watts remote mounted sythesized mobiles were then used to upgrade the system to replace the aging Pegasus's. The object of the system was to provide a full communications system between all RAF - Army - MoD - Royal Navy bases throughout the UK. DAVE G8EPR September 2004....
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