This 10W commercial amplifier circuit was found in the September 1958 Radio Electronics magazine. Its power is 10W with excellent sound quality.
This shield circuit allows recording of the signal from a serial output on a cassette recorder, with...
This Japanese radio receiver is from the 60s. It has 6 transistors and is powered by 4 batteries with...
The integrated circuit used is a voltage reference from Motorola. This configuration was obtained in...