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 was found in a Motorola documentation from 1975. Modern equivalent transistors such...
This circuit is from the datasheet of STMicroelectronics, being indicated for the voltage...
This circuit was found in 1980's Radio Electronics. The circuit produces a 1500 Hz modulate 35 kHz....