Suggested by an old RCA manual, this circuit makes use of the period components. Data for the transformer is provided in the original documentation from the 1960s.
The figure shows how to use an LM3914 with a variable range moving point. The circuit has an...
This simple transistorized radio for listening on a crystal phone was found in a Japanese...
This oscillator found in the April 1984 issue of Radio Electronics magazine is designed for bird...