Institute Newton C. Braga

Circuit Bench

Emitter coupler oscillator (CB7425E)
This circuit, which operates between 7 and 30 MHz, was found in Radio Electronics from the 1980s....
Tube negative ion generator (CB21002E)
This circuit was found in an old American magazine for radio amateurs. The circuit is based on a...
Variable voltage regulator (CB9160E)
This low current circuit allows the regulation of voltages in the range of 0.5 to 30 V. We find it...