This circuit was found in a 1975 documentation. The SCR can be of any type and in this case, we have the horn activation. The relay must be a 12 V type with high contact current.
This circuit was used to reinforce radio signals for listening on the phone, making it possible to listen...
This transistor amplifier does not use a source with a transformer being fed directly by the power...
This TTL circuit found in the September 1996 issue of Electronics Now magazine doubles the...