This transformerless 16-ohm speaker circuit was found in a Radio Electronics from October 1963. The circuit is powered by 12 V and the gain is 50 dB.
This well-known circuit is another version of a 2-transistor transmitter found on the Internet. In this...
This traditional amplifier configuration is from the National Semiconductor's Linear Applications Handbook...
We found this circuit in a 70s Electronic Design documentation. The circuit uses general-purpose...