This amplifier, whose mounting on a printed circuit board was described in Radio Electronics of October 1960, has 35 W of power. The power supply uses a transformer and a set of 5 tubes.
This circuit was found in a Popular Electronics from the 90s. The circuit has 4 frequency ranges...
This circuit for controlling AC loads in the power grid was found in a 1967 Electronics World. The load...
This hybrid power supply circuit was found in the August 1997 issue of Electronics Now magazine. The...