How do you block radio interference from speakers/cordless phones/amps?

Question

We live at the top of a hill at we can't use any electronic device that has a speaker (or its equivalent) because of the constant interference of a radio station, or other sources.

Answer 1

First things first. Start by checking the cables your using. The better and shorter the cable the less interference. Ideally you should be using 75ohm cable with double shielding (Acoustic Research make cables as good as Monster cables but half the price). Don't use a 6 foot cable for a 3 foot run. Use a cable with as little excess as possible and never run the cables bundled together, especially if your running both audio and video cable.
Try moving the device to other areas of the house, away from windows and doors. You can also try an RF filter from most electronics stores. If all this fails try contacting the radio station. They are obligated by the FCC to provide you advice and or a solution.

Answer 2

The classical solution is to use small value capacitors on the AC cord coming into your stereo and on the speaker wires coming out of your stereo. The small value will not bother the audio frequencies but will short out the radio frequencies. Try a 0.1 uF value on the speaker wires where they come into the stereo. Make sure you have someone who knows what they are doing if you are going to put one on the AC input. The capacitor must have a greater than 200 volt rating and be non-polarized.

Answer 3

Build a giant Faraday cage around your house.