This receiver for the AM band with 6 transistors was manufactured in the 60's in Japan. The power is made with 9 V and the circuit is of the super heterodyne type with FI of 455 kHz.
We found this configuration in an English publication from 1980. The circuit converts triangular signals...
We found this circuit in a 1977 National Semiconductor Databook. The circuit can use other FETs...
This circuit was found in a Popular Electronics from the 90s. Transistors are general purpose...