This circuit for powers up to 240 W was found in a 1967 RCA SCR manual. The SCR must be in accordance with the controlled load.
We found this circuit in a Radio Electronics from the 90s. The circuit is for conventional analog...
The operational of this amplifier can be the 741 and the resistors R1 and R3 are of 10 k. R2B is...
I found this circuit in a Popular Electronics from November 1999. The magazine is no longer...