4060 XTAL Oscillator (CB22401E)

We found this oscillator in an old documentation. The crystal frequency can be different to get other output frequencies.

Balanced Microphone Amplifier (CB15078E)
This circuit uses a TL071 to differential amplify the signals from a microphone and thus reduce...
Wireless Headphone Transmitter (CB4582E)
We found this circuit in a 1995 publication. It makes use of infrared LEDs of the type existing at...
1 kHz Astable (CB24838E)
This circuit is from September 1984 Radio Electronics. The frequency can be changed by changing C1 and...