Microphone Amplifier (CB6204E)

This amplifier was found in a 1969 Mullard documentation. The circuit uses transistors that have as modern equivalents the BC548 and BC549.

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1 mA current drain (CB8850E)
This circuit was found in 90s Radio Electronics. The transistor can be any general purpose....
Monostable 4013 (CB11123E)
The circuit below shows how to obtain a monostable from a CMOS 4013 flip-flop. The actuation time...
Drift compensation for transducer (CB7367E)
This circuit is from Philips' 60s documentation. The circuit can be applied to modern operational...