Tone Oscillator (CB22066E)

Found in old documentation, this oscillator with the LM380 produces an audio tone in a speaker. Frequency is set in VR1.

30 and 50 V power supply (CB8678E)
This source was originally suggested by Delco in a 1969 documentation to power amplifiers up to 50 W. The...
Intercom for noisy environments (CB21069E)
Found in a Popular Electronics from the 90s, this circuit is suitable for communication between rider...
Analog switch (CB21264E)
Found in an Analog Devices documentation from the 1990s, this circuit uses components that admit...