27 MHz Oscillator (CB24983E)

This tunnel diode oscillator was found in July 1986, Radio Electronics magazine. Note the low supply voltage.

Photoelectric alarm (CB24581E)
We found this circuit in April 1979 Radio Electronics magazine. The circuit is based on the 555...
General Purpose Preamplifier (CB6977E)
This circuit was found in a Popular Electronics from the 90s. The circuit uses general purpose...
Infrared Remote Speaker (CB4898E)
This 80's circuit uses an integrated amplifier of the era, but nothing prevents it from being...