This 80's circuit uses an audio amplifier to obtain a symmetrical source from a single source. The maximum current is on the order of 1.3 A and the input voltage must not exceed 20 V.
The circuit shown is a suggestion given by an English publication from 1980. In it, a...
We found this 50 kHz 25 MHz crystal tester in a 1978 QST magazine. The FET can be the BF245 and...
This two transistor audio amplifier stage was found in a publication of the year 1968. The...