This low-power circuit was found in the March 1990 issue of Radio Electronics magazine. It consists of a tone control solution for portable turntables.
Frequency in this oscillator is controlled by a crystal. Any 1 MHz to 15 MHz can be used. The JFET can...
This circuit was obtained in an American publication of the time. Transistors are commonly used. The...
This Philips circuit of the 70's makes use of components of the time. The DZD40 is an uncommon...