We found this configuration in a 1974 publication. Transistors can be replaced with equivalents such as 2N2222. The circuit has a dynamic range of 60 dB.
The circuit transistors, found in a 1974 documentation, may be the BC548. The circuit is used in...
Found in 1966 General Electric documentation, this circuit uses solicon unilateral switches (SUS)...
This circuit was found in a 1966 General Electric publication. The circuit applies to other triacs...