Broadband Amplifier (CB21859E)

This circuit has a voltage gain of 30 times and passband of 14 MHz. The circuit is from the 1974 Ferranti transistor manual.

Stereo Multiplexer BA1404F (CB26042E)
This basic circuit was found in the March 1998 issue of Electronics Now magazine. The circuit is...
Tone encoder (CB20351E)
This circuit was found in documentation for radio amateurs of the 1980s. The circuit is intended to...
40 and 80 Minute Timer (CB4538E)
I found this simple circuit an English magazine from 1984. The circuit can be easily assembled by simply...