This circuit provides a few watts of output and can be used in the car as an auxiliary amplifier. Transistors must be mounted on heatsinks and the speaker can be 4 ohms or 8 ohms.
I found this circuit in a 1978 publication. The circuit can be assembled with a BD136 transistor to...
This sensitive 4-transistor signal follower can be used in both audio and RF circuits. P1 is a...
This is a commercial circuit from the year 1958. Transistors are germanium types and transformers...