This is a battery powered 3W power amplifier using germanium transistors. The circuit is from an English documentation from 1967. The transistors are from the time.
The figure shows how to implement an amplifier with gain 10 using the operational amplifier LM41....
This experimental AM radio circuit was found in a 1979 English magazine. It can be fitted with a...
This circuit shows how it is possible to control 9 loads with only 6 Triacs using the matrix...