|Collins R-392/URR Mobile
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Firstly, a site that covers this excellent set in far more detail (including schematics) may be found at: http://www.roveroresearch.com/r392/r392.html
This is the receiver component of another vintage Collins radio system and is usually paired with the T-195 HF transmitter to form GRC-19. It is often said to be a 'little brother' to the venerable R-390 - in the sense that is is ruggedised and simpler but performs just as well. It weighs in at a hefty 55lbs in its water-resistant case and has no power supply of its own - relying on the vehicle it was installed in. It was developed in the late 1940's and fully battle-tried in Korea although stayed in production via Collins licensees (such as Philco, Stewart-Warner and Western Electric) until the mid 1960's.
If the Collins R-390 & R-390A are the ne plus ultra of American boatanchors (in the same way that the Racal RA17L is considered in Britain) then the little brother set comes a close second in the race. It does not have all the features of the R-390 but matches its performance.
Last updated 1st May 2003