Institute Newton C. Braga

Circuit Bench

Transistor Radio TR 182 (CB18374E)
We found the circuit of this Japanese transistorized commercial receiver in a documentation from...
Rain alarm (CB23602E)
This water-triggered relay circuit was found in a Radio Electronics from May 1959. The circuit has only...
Transistor RIAA Preamplifier (CB1372E)
We found this circuit in documentation from the 1970s; The circuit uses Japanese transistors of...