For signals up to about 500 kHz modulated in amplitude and transmitted by the power network, the figure shows the receiver. The circuit is from a Radio Electronics from February 1989.
We found this transistorized AM receiver of the regenerative type of excellent quality in a...
This continuity tester for low resistances was found in an English magazine from 1978. The circuit...
Found in American documentation from the 1980s, this circuit rejects strong MW stations that may...