This receiver, called Peace, was manufactured in the 1960s in Japan and was powered by a 9 V battery. The radio for medium waves had an earphone and good sensitivity.
In the figure we show how to use an old portable AM or FM radio as a test amplifier or signal...
The purpose of this simple stabilized source, obtained in a documentation from the 70s, is to...
The integrated circuit is the 4093 and one of its four gates is used. The frequency is given by...