Practical advice needed: What do I do now?

Fri Oct 1 10:25:32 EDT 2010

Not suppressor--filter. But that assumes that the noise is getting
into your radio via the AC power line. If the radio is battery powered
(and you unplug it from the AC line), do you still have the problem?
If yes, filtering the AC that feeds the computer system will not help
or won't help much. However, if unplugging the radio from the wall
helps, then filtering the AC that powers the computer might work. It
is likely to (but not guaranteed to) work better than filtering the AC
line that powers the radio because filtering the line that powers the
computer will reduce the noise that is getting onto the house's AC
wiring and is radiating into the radio. The kind of filter you need is
a low-pass filter, which lets the AC power through but carries the
noise to ground. Ideally, you should plug the filter into a three-wire
AC outlet (one with receptacles for two parallel blades, of which the
narrower one is AC Hot and the wider one is AC Return. A third round
or U-shaped opening is the ground receptacle). If you don't have
three-wire outlets in the room, or if the ground terminal is
electrically floating--which is illegal and hazardous but is often the
case--the filter is unlikely to be effective.

Dan Strassberg (
eFax 1-707-215-6367

----- Original Message ----- 
From: "Doug Drown" <>
To: "=?utf-8?b??=" <>
Sent: Friday, October 01, 2010 9:52 AM
Subject: Practical advice needed: What do I do now?

>I just set up my old computer in the house where I'm newly residing,
>and the noise interference on AM is awful. FM is fine.
> I didn't have this problem at all with the computer I had borrowed
> for the past several months. II gather what I need is some kind of
> suppressor, but I have no idea what. When it comes to computers, I
> can write, send, save, upload, download, maneuver around the
> Internet, and create a website (kinda-sorta), but when it comes to
> the tech ends of things I'm pretty ignorant.
> -Doug

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