27 MHz Oscillator (CB24983E)

This tunnel diode oscillator was found in July 1986, Radio Electronics magazine. Note the low supply voltage.

Capacitance meter 10 to 1 000 uF (CB18929E)
This capacimeter was obtained in European documentation from the 1980s. The indicator instrument, a...
Logic Drive of the 7805 (CB25236E)
This circuit for the logic control of the 555 in a power supply was found in the October 1989...
Zero Crossing Detector (CB20158E)
This configuration with the LM111 was found in your factory manual. The circuit can be implemented with...