Full Comparator (CB6548E)

Applying an operational of the time, this circuit of an old documentation can be elaborated with modern operational. The feed must be symmetrical.

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Field strength meter (CB23701E)
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LM3900 High Voltage Audio Amplifier (CB14225E)
The output stage of this amplifier can operate at high voltage. The transistor must be a high...
Linear VCO (CB12268E)
This article is from an old publication from 1978. The transistor can be a BC548 and the power...