Voltage Controlled Oscillator (CB22373E)

This circuit has a duty cycle of 50%. We found it in old English documentation. The center frequency is around 1 kHz.

Sequential Control (CB6553E)
This circuit is from 1970 documentation. The SCRs are types of the era that can be replaced with 106...
Tuning Fork (CB205E)
The circuit shown here produces a pure square tone of 440 Hz that is suitable for musical...
Voltage Controlled Oscillator (CB22373E)
This circuit has a duty cycle of 50%. We found it in old English documentation. The center...