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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Erase oscillator (CB7338E)
Suggested by Mullard in a1969 documentation, this circuit generates the erasure signal for tape...
Damped Oscillator (CB403)
A pulse applied to the input of this circuits results in a damped signal in the output. Frequency...
Call warning (CB9294E)
This circuit can activate a powerful lamp or call system when a telephone call occurs. Suitable for...