This 1967 Motorola circuit is intended for operation with signals up to 250 MHz delivering a 50 MHz signal at the output. The transistor is the MM1941, uncommon today.
I found this circuit in a 1986 English magazine. It can still be easily assembled, replacing the...
This circuit was obtained in a Motorola manual from 1978. We can use any triac and the coupler with...
This circuit, from an old publication, can employ silicon transistors like the BC548 and the...