This hybrid audio amplifier from National Semiconductor was found in the June 1994 issue of Electronics Now magazine. It is powered by 24 V.
This TTL dice was found in an old American 1980s documentation, but can still be easily assembled....
The frequency generated by this circuit depends on the crystal used. Frequencies up to a few tens...
This circuit is designed to be wired to the input of audio amplifiers or preamplifiers. Since it...