Precision Crystal Calibrator CIR22334S CB21784E (CB21784E)

We found this circuit in a 1977 radio documentation. The circuit uses TTL frequency dividers from the time.

Voice operated transmitter (CB20412E)
This transmitter kicks in when the microphone picks up sound. This sound then modulates the signal...
Varicap Variable Frequency Oscillator (CB13088E)
The great advantage of the circuit shown in the figure is the fact that its frequency is...
Twilight switch (CB24176E)
This circuit for incandescent lamps was found in the February 1972 Radio Electronics magazine. The triac is...