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.
With the name of transitube we find this MW receiver in documentation from the 50's. It uses a...
This type of circuit is interleaved between a microphone and a transmitter in order to improve the...
We found this circuit in an Electronics Now magazine from June 1995. The transformer has a primary...