This 1950s audio amplifier uses output tubes of type 1625 in its output stage. The Class B circuit provides a few watts of power and uses transformers that are not readily available today.
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...