This circuit was proposed by an old American documentation for listening to SSB stations. The circuit makes use of a small old radio 455 kHz IF transformer.
These circuits were found in the February 1995 issue of Electronics Now magazine. The circuits have...
This filter with a Q factor of 50 was found in the Linear Applications Handbook by National...
This radio version of 1 transistor, extensively explored on this site and in this section, is from...