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 circuit was obtained in the publication 101 Electronics Projects of 1979. The circuit can be...
This control was obtained in an old publication from 1985 and uses a triac, which today can be of...
This is the traditional configuration of an unregulated bridge rectified power source. The circuit...