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 converts square (rectangular) signals into triangular signals with typical 16 V...
We found this circuit in a spy book from the 90s. Transistors admit equivalents and the coil can...
This circuit was obtained in a 1979 English magazine. This circuit is a treble filter that,...