Using 4 tubes, this 1924 receiver combines new technologies as an intermediate frequency stage that was already beginning to appear. Listening is via phone and battery power.
The circuit shown was found in a 1994 Linear Applications Handbook by National Semiconductor. The...
We found this circuit in documentation from the 1970s; The circuit uses Japanese transistors of...
This traditional crystal oscillator configuration with FET was found in the 1994 Linear...