Antennoscope (CB21782E)

This circuit works as a useful field meter for radio amateurs. We found it in documentation from 1977.

Symmetric Power Supply using Transistors (CB12665E)
Using transistorized regulators with NPN and PNP transistors we can create a symmetrical source of...
Two-phase VCO (CB9433E)
Found in Radio Electronics from the 90s, this circuit generates signals from 100 Hz to 1.5 kHz....
AC voltmeter with the 741 (CB13654E)
We found this circuit in a 1973 documentation. The null adjustment trimpot is 10k. The circuit can be...