This transmitter for the 3.5 and 7 MHz ham radio was found in a 1950s Japan publication. No information was given on the coils and the power supply.
This simple voltage regulator or stabilizer uses only two component and can source up to 100 mA to a...
Based on the BA1404 integrated circuit, this circuit was found in the July 1992 issue of Radio...
This voice scrambler is used to obtain effects in the 2.5 to 5 kHz range. The circuit is from...