This circuit was found in GE documentation from the 90s. The circuit can be used as a shield for telephone lines.
This beat frequency oscillator was found in a 1980s documentation. The original FET has a grounded...
XTAL from 4 to 20 MHz can be used in this oscillator. The XRF choke can range from 10 to 100 µH...
Found in Popular Electronics this circuit uses common components to control an incandescent lamp with...