This 1965 General Electric circuit uses a "Thyrector" that is a suppressor of the time. The setting shows your use of the trigger line.
We found this circuit in the June 1992 issue of Radio Electronics magazine. The sensor is a common...
This circuit converts a positive CMOS supply voltage to a negative one. We found it in a 90s...
This tone control was obtained from the CA3140 datasheet, originally created by RCA. The CA3140...