[RFI] RFI Digest, Vol 42, Issue 1

[Leigh L Klotz, Jr.]

In mine, the control and power lines are not beaded, and are not 
twisted.  The control lines are a random jumble of ribbon cables, all 
tied into a single wiring harness.  It may be that the signals are 
differential, but I doubt it.
Leigh/WA5ZNU
On Fri, 2 Jun 2006 10:09 am, Lee Hill wrote:
> 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 at contesting.com [mailto:rfi-bounces at contesting.com] On
> Behalf Of rfi-request at contesting.com
> Sent: Friday, June 02, 2006 12:00 PM
> To: rfi at contesting.com
> Subject: RFI Digest, Vol 42, Issue 1
>
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> 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 at arrl.net>
> Subject: Re: [RFI] Washer RFI/EMI
> To: <rfi at contesting.com>
> Message-ID: <008301c685db$04d2e560$033ca8c0 at 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
>
>
>
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> End of RFI Digest, Vol 42, Issue 1
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