This simple SCR control was found in the December 1987 issue of Radio Electronics magazine. The circuit uses a well-known C106 but can be used in equivalents of the same series.
Relays specially designed for operation in harsh environments of Phoenix Contact can be purchased...
In the figure we have a typical Wien Bridge oscillator with AGC. The negative waveform is sampled by...
We found this circuit in an old documentation, but the circuit is current due to the components it uses and...