Found in a manufacturer documentation from the 90s, this circuit makes use of period components. The configuration can be adapted to use modern equivalent components.
Using a large inductance, this circuit was found in a Popular Electronics from the 90s. The...
This circuit is from Motorola technical documentation from the 70s, but it can be easily assembled...
This circuit was found in a 1990 English magazine. It is a system in which the audio signal from...