Using the LM3909 this circuit was found in the January 1992 issue of Radio Electronics magazine. Resistor R1 should be chosen according to the table given next to the diagram.
This circuit was obtained from an English magazine from 1977. The magazine no longer exists, but...
This powerful high-fidelity amplifier was described in an article in Radio Electronics magazine in...
The SCR MCR1000 MOS is a rare component today. It is an SCR with MOS field trip, requiring a...