Cable Locator (CB21303E)

This audio detector circuit can be used for cable identification. We found it in a Popular Electronics from the 90s.

Balance indicator for stereo (CB9107E)
This circuit was found in Electronics Today International of the 80's. The circuit uses still...
FM Oscillator with Varicap (CB21143E)
Found in an Electronic Design, this circuit is intended to produce signals in the VHF band. The...
15 W Amplifier using the TDA3000 (CB430)
This circuit uses a not easy to find IC these days. The circuit sources 15 W to a 4 ohm load and...