Found in an American publication from the 1980s, this circuit can be found in commercial sound equipment of the time. The list with the component values is given next to the diagram.
This conventional oscillator can generate signals from 8 to 30 MHz depending on the crystal used....
This reverb effect was found in the December 1961 Radio Electronics magazine. It makes use of...
This circuit is from a March 1967 Radio Electronics. The circuit applies to general purpose SCRs...