Early mains powered Tuned Radio Frequency (TRF) radio. The tuning coils are very large and mounted in copper shielding cans in order to achieve a very high Q and hence get adequate selectivity with the TRF design.

Physical Description

Wooden cabinet with a sloping front. There is a thumb-wheel tuning control on the main panel and 3 knobs and two levers on a small vertical panel at the bottom of the front. The knobs are the volume control, a band switch and an aerial trimming capacitor. The two levers each rotate one of the stators of the three gang tuning capacitor through a small angle. This was done to aid ‘tracking’ to make sure that all three tuned circuits are tuned to exactly the same frequency over the tuning range of the receiver.

More Information