Found in documentation from the 1980s, this circuit can generate signals between 6 and 8 MHz. The frequency can be slightly varied in the setting. FET is a general-purpose type.
We found this TTL circuit with the 7400 in the January 1975 Radio Electronics magazine. The power...
This adjustable direct current source circuit uses a triac operating as a variac. The circuit is...
This radio's transistor is powered with the signal's own energy, producing its amplification....