Institute Newton C. Braga

Circuit Bench

SWR meter (CB7063E)
Standing wave ratio or SWR is an important measure of whether all power from a transmitter is being...
Experimental Solar Cell (CB4421E)
This circuit or practical idea comes from a time when cheap solar cells were not available (1992). What is...
10 MHz Tuned Resonator Oscillator (CB6142E)
This circuit was found in a 1980s documentation for amateur radio. The circuit makes use of...