This circuit with 4 transistors can receive signals in 6 shortwave bands. The circuit is from a Radio Electronics from May 1958. The output is for high impedance headphones.
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...