This control for bass, midrange, and treble was found in the March 1995 issue of Electronics Now magazine. The circuit requires a dual power supply.
This old receiver (1967) uses germanium transistors from the time and coupling transformers,...
This circuit was found in old documentation. D1 can be a diac. | Clique na imagem para ampliar...
This oscillator takes advantage of the 2000 ohms headphone inductance as the oscillator circuit coil....