Found in a 1965 General Electric datasheet, this low frequency circuit divides the frequency of a 20 kHz signal by 10, thus obtaining a 200 Hz signal.
XTAL from 4 to 20 MHz can be used in this oscillator. The XRF choke can range from 10 to 100 µH...
This circuit was obtained in a Hobbyst Handbook from 1990. The circuit can be easily assembled...
) This circuit was obtained in 1965 General Electric documentation. SCRs can be modern common...