60's crystal radio (CB22171E)

Found in an English publication from the 1960s, this circuit uses period components, including the commercial grade coil.

8 A power supply (CB8464E)
This 13.6 V power supply with 8 A output was suggested by Texas Instruments in the documentation of...
Audio Selective Filter (CB24272E)
This sophisticated filter for audio signals was found in Radio Electronics magazine. The...
Sound Operated Flash (CB10379E)
This circuit was found in a 1977s English magazine. The SCR can be the TIC106 and the transistor the...