This is the typical audio amplifier for a 1967 television. We found it in a magazine from the time. Note the use of the output transformer and the high supply voltage. The circuit is an RCA CTC21.
This filter was found in a 1975 American technical publication. The filter can be of any type and...
This motor logic control was found in the September 1985 issue of Radio Electronics magazine. The...
This configuration can be found elsewhere on this website and section. The circuit is from Popular...