We found this circuit for receiving shortwave on a mediumwave radio in a 1986 Hobbyst Electronics PE. The circuit has the received band given by T1 which can be an FM IF.
This two-output circuit was found in General Electric documentation from the 1990s. The circuit uses...
This Baxandall tone control was obtained in an Argentine publication from the 70s. The circuit uses...
This circuit is from Radio Electronics from March 1985. The circuit uses common components at the...