Tone Oscillator (CB22066E)

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

Preamplifier for 60 kHz band (CB20234E)
This circuit uses a loop antenna to receive and amplify signals from the 60 kHz long wave band....
4011 Triggered Oscillator (CB11387E)
The frequency of this oscillator depends on R and C (see math section for electronics). The...
Level Detector with hysteresis (CB5167E)
This common operational configuration can be implemented with modern equivalent. Next to the...