This 6-transistor Japanese commercial radio was manufactured in the 1960s. The receiver is a super heterodyne type with germanium transistors and is powered by a 9 V voltage.
This circuit is from a Radio Electronics magazine from August 1990. The indicator module is of a...
This small transmitter has an RF amplifier stage with coupling made from the central socket of the...
We present a different voltage regulator that is based on a transconductance operational...