Operating in class AB1, this high-fidelity amplifier was found in the 1961 RCA tube manual. The circuit has high input impedance and good gain.
This circuit is designed to activate an automotive alarm after 8 minutes of activation. Of course...
To brighten up those with radios with 4 batteries or more, here's the most economical of our...
Using a DAC038 IC this circuit is from Radio Electronics from May 1983. The circuit must be...