30 MHz Amplifier (CB5939E)

This low noise circuit was obtained from a 1980s US RF publication. Transistors used are uncommon today and the gain is 19 dB..

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Automatic Transmitter Switch (CB24533E)
This circuit was found in the December 1977 issue of Radio Electronics magazine. The circuit uses...
Tone control (CB12811E)
We obtained this circuit from an old Argentine magazine. The circuit originally uses germanium...
High Input Voltage Regulator (CB13050E)
The 78XX series voltage regulator integrated circuits do not support an input voltage greater than...