This good power amplifier, a few tens of watts, is part of an article in the December 1972 Radio Electronics magazine. The power supply must be symmetrical with at least 3 A.
This circuit can use almost any operational amplifier and the FET can be the BF245. The circuit...
This circuit is from March 1978 Radio Electronics. The 4-digit circuit uses a period module and is...
This oscillator was found in the January 1996 issue of Electronics Now magazine. The frequency is given by...