Electrical Projects With this device appliances can be checked for noise production and, if faulty, modified with a small capacitor to filter it out.

Detection of appliance noise with this device is quite simple. Merely place the tester near an appliance and tune out broadcast stations by adjusting the variable capacitor control knob. If the appliance is faulty, interference should be heard from the speaker. If a power cable is at fault, you can determine at what point the shield is "leaking" by following along the cable with the tester.

October 6, 2008