Reception Set R103 (UK)
Reception Set R103
was a small HF receiver designed for monitoring applications in British Army
non-combat vehicles such as staff cars. The design appears to date from before 1940.
The equipment covers
the frequency range 1.7 - 7.5MHz in two switched ranges and is tuned by a
Muirhead drive featuring a directly calibrated engraved tuning dial. It
was intended to be used with an external power supply, which operated from
a 12 Volt DC supply, and which also contained the loudspeaker.
The receiver is a
seven valve conventional superhet, consisting of a single RF amp, mixer/LO,
two IF stages, detector/AVC/AF amp, AF output stage, and BFO.