They are using PWM motor control to run the high speed motor.
The problem is likely to be low frequency noise coming out the AC line cord.
I would buy a high performance AC line filter for a few bucks off ebay. It
will work tremendously better than even a correctly selected ferrite alone.
Mount the filter body directly to the washer, remove some paint so you get
direct contact. Use very short (less than 6 inches, this is only 75mto 20m
not 2m) wires between the line filter and the AC input of the washer. Then
use a different power cord to go into the line filter. Beware this could
void your warranty.
Keep the wires between the washer and the filter far away from the AC input
cable and where it connects to the "line" side of the filter. The "load"
side of the filter connects to the washer. Make sure the filter current
rating is above the max listed on the washer. Peak current can reduce the
performance of the filter.
Insulate and cover the thing properly/securely so no kids, animals, or
objects cause fire or electrocution.
73
Lee
WB1ADR
-----Original Message-----
From: rfi-bounces@contesting.com [mailto:rfi-bounces@contesting.com] On
Behalf Of rfi-request@contesting.com
Sent: Friday, June 02, 2006 12:00 PM
To: rfi@contesting.com
Subject: RFI Digest, Vol 42, Issue 1
Send RFI mailing list submissions to
rfi@contesting.com
To subscribe or unsubscribe via the World Wide Web, visit
http://lists.contesting.com/mailman/listinfo/rfi
or, via email, send a message with subject or body 'help' to
rfi-request@contesting.com
You can reach the person managing the list at
rfi-owner@contesting.com
When replying, please edit your Subject line so it is more specific
than "Re: Contents of RFI digest..."
Today's Topics:
1. Re: Washer RFI/EMI (Paul Christensen)
----------------------------------------------------------------------
Message: 1
Date: Thu, 1 Jun 2006 20:25:14 -0400
From: "Paul Christensen" <w9ac@arrl.net>
Subject: Re: [RFI] Washer RFI/EMI
To: <rfi@contesting.com>
Message-ID: <008301c685db$04d2e560$033ca8c0@Dorm>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
> I've had no RFI problems with my LG High Efficiency Washer/Dryer.
> It's quieter than my CRT television.
I have +40 dB/S9 noise on 75M from a new GE Harmony Washer and can be heard
all the way up through 20M. The dryer appears to emit no RFI/EMI.
Is there a common cure among the newer generation of washers?
Paul, W9AC
------------------------------
_______________________________________________
RFI mailing list
RFI@contesting.com
http://lists.contesting.com/mailman/listinfo/rfi
End of RFI Digest, Vol 42, Issue 1
**********************************
_______________________________________________
RFI mailing list
RFI@contesting.com
http://lists.contesting.com/mailman/listinfo/rfi
|