This 12.5 W quasi-complementary amplifier was found in a 1969 General Electric publication. Note the high supply voltage. Transistors are common types at the time.
Another of the many anti-bounce circuits that we have in this section of our website. This one...
We found the circuit of this Japanese transistorized commercial receiver in a documentation from...
Here is an interesting project for those who own a pool and are afraid that someone will fall into...