With a 475 V supply, this amplifier published in Radio Electronics magazine in January 1958 offered good power. The amplifier used 4 tubes.
This is one of the many versions of amplifiers with LM386. This was achieved in an old publication (1981). The...
The figure shows how to generate a sinusoidal signal using 4 flip-flops. The circuit is from a...
The integrated circuit, in this 1986 application, is not a very common component today. The...