Suggested by a 1990 book for amateurs, this circuit makes use of an integrated component that is not common today. It converts signals from one band to signals in a 10.7 MHz band below.
This dual-LED circuit indicates three signal levels. It was found in the January 1996 issue of...
This DC-DC converter was found in old RCA documentation. The circuit operates at 15 kHz. The...
Found in a Motorola documentation from 1965, this circuit consists of an electronic ignition with a...