This circuit aims to increase the selectivity of receivers whose FI is 455 kHz. The circuit is from 1975 documentation. The transistors can be the modern BF494 equivalents.
This 6-transistor receiver was manufactured in Japan in the 60s. The circuit is superheterodyne and has a 6V...
This circuit was found in a 1986 documentation and it may be difficult to obtain some of its...
This circuit was found in a 1980s documentation. The low voltage circuit uses a PUT. Transistors can...