Premier Radio 3 valve TRF receiver.

[BusyBee]

For interest, I went back to basics and did a readup on TRF recievers in the Radiotron Designer's Handbook (4th edition). The volume control arrangement, as in the Midgetronic, is shown, with a small explanation. The emphasis seems to be minimal cost, with control of valve biasing and low minimum volume for strong local signals. See AC Operated Receivers, page 1256.

Tracy