R 1224 Posted on October 27, 2014 RAF R1224 A This is the RAF R 1224 A receiver. It is a superhet receiver. It is part of the Station W/T portable Type 9. Frequency range was 1,5 Mc – & Mc. Output impedance 2000 and 8000 ohm. Heater voltage 2 volt. Posted in RAF R-Radio's.