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 the November 1994 issue of Electronics Now magazine. The circuit is...
This circuit was found in a Japanese magazine from 1971. The circuit uses Japanese transistors of the time,...
This proximity sensor was found in a 90s Popular Electronics. The base is a PLL567 that operates...