Institute Newton C. Braga

Circuit Bench

2-Transistor MW Radio (CB18397E)
This receiver for listening on the phone was found in a Japanese magazine in 1967. The circuit uses...
1-transistor radio (CB20247E)
This medium wave radio works with any general purpose NPN transistor. The diode must be made of...
Submarine Microphone (CB21071E)
This circuit is intended for underwater communications. Of course, the critical point is the...