This radio for the AM band has the traditional superheterodyne configuration with several transistors and integrated audio amplifier circuit. The circuit is from the 70s.
This circuit with SCR is from a Radio Electronics magazine from September 1965. It is a commercial...
This circuit was found in the July 1986 issue of Radio Electronics magazine. The circuit has a...
This circuit was found in a QST from the 1990s. The circuit expands the scale of a 10V instrument to...