This RF preamplifier for the 450 MHz band was found in an amateur radio documentation from the 1980s. The transistor supports an equivalent operating at the recommended frequency.
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...