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.
This circuit consists of a booster for the medium wave band. We found it in an English publication from...
This circuit converts signals from the 350 kHz to 500 kHz longwave (VLF) band to the 4.35 to 4.6...
This circuit of old documentation can be implemented with modern operational amplifiers. The...