This circuit was found in Radio Electronics from the 90s. The components used are common, and the transistors and CIs must be equipped with heat sinks.
This FET voltmeter is from an old 1974 amateur radio publication. The circuit can use MPF102 or...
This 80's circuit can be used in media recovery. The integrated circuit is of the time, but modern...
Suggested by an old RCA manual, this circuit makes use of the period components. Data for the...