This circuit is placed between the instrument pickup and the amplifier input. The same version can be found from other sources in this section. This is from an English magazine from the 80s.
This traditional circuit is from a 1972 RCA technical publication. The circuit can be developed with...
This well-known siren configuration using complementary transistors is from a 1980s documentation. The...
This 1967 Electronics World circuit is suitable for frequencies up to 1 MHz. The setting applies...