This Japanese transistor radio was manufactured in the 1960s in Japan. The circuit of 6 transistors is for the medium wave range and is powered by a 9 V battery.
This circuit delivers at its output a voltage that proportional to the amplitude of the input...
This circuit generates signals with opposite phases determined by C1 and adjusted by R2. The...
In the diagram from the November 1999 Electronics Now magazine we have the way to improve both the...