We found this circuit in an old American documentation. SCRs can be modern equivalent types. The transformer has a 5 A current, according to the SCRs.
This small audio amplifier is based on the LM390 with a minimum of external components. We found it...
The integrated circuit used is not common today. The circuit presents a bass boost according to...
This circuit provides two outputs of the same signal. One with the original phase and the other...