This circuit operates with an AM radio tuned to or near 900 kHz if there is a station at this location. The coil consists of 60 + 40 turns 28 on a ferrite rod.
Found on an 80's Radio Electronics, this circuit is designed to pass the 300 to 34,000 Hz voice...
This circuit was found in a 1960s Motorola documentation. Transistors are types of the time and...
This circuit is from an English publication from 1978. The transistors can be the BC548 and the...