THE PYE MILITARY ARMY-RAF MOULD VHF-UHF COMMS SYSTEM

Commissioned approximately 1980.
Virtually fully decommissioned 2003-2004
Some sold as scrap from Rosyth at various military auctions in 2004.  Some scrapped at various army radio establishments.

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....

 

 

PYE PEGASUS M252 VARIOUS.jpg (154632 bytes)       

   

PYE PEGASUS M252 MAN TRANSPORTABLE.jpg (98225 bytes) PYE PEGASUS M252 DASH MOBILE & SELCALL BOX.jpg (81581 bytes)


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12 December 2014 10:40:55

All pictures are Dave Hicks 2014 or Martin Briscoe 2014 
Please ask permission before using elsewhere

Any addition notes, comments or photographs of any of these sets are very welcome and can be sent to:
Technical queries and comments about The Pye Museum to Dave G8EPR
Website queries and comments to Martin GM8AOB

The site deals mainly with Pye (and other companies) Radio Telephone and Telecommunication equipment.  It is very unlikely that we will be able to answer any questions about Pye domestic radios, radiograms, record players etc etc

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