We found this circuit in a Radio Electronics from April 1965. The components are from the time and the power supply is for 12 V cars. The transistor must be equipped with a good heat radiator.
We found this 4-transistor receiver for the AM MW range in a 1960 transistor manual from Sylvania....
This 16-bit circuit was found in a 2005 Linear Technology application manual. The circuit uses...
The circuit is from an English publication from 1970, but it can be assembled with more modern...