There were three British designed VHF transceivers according to the research pages for the Burning Blue board game:
TR 1133 4 channel, 100 to 120 mc, signal trials begun 30 October 1939, hand built units.
TR 1143 4 channel, 100 to 124 mc, initially hand built, large scale production began in 1940.
TR 1430 8 channel, 100 to 124 mc.
Much of this VHF radio development took place during the bombing of Britton which caused delays in design, manufacturing and delivery. Obviously difficult times. These VHF sets replaced the pre war TR 9 HF transceiver. They were designed to be drop in replacements with no change in cable wiring. Perhaps this is the reason for the clunky frequency change mechanisms in the VHF radio?
It is not clear to me if the TR 5043 aka SCR-522 was a British design or a retooling of the TR 1143 by Bendix to facilitate American manufacturing methods. This later design more then doubled the operating bandwidth from 100 to 150 mc.
Jim
Logic: Method used to arrive at the wrong conclusion, with confidence. Murphy