Roger,
Ok so where do we buy appliances now that are RFI free? Seems like
everything is going digital with a microprocessor and a switching power
supply.
Hardy N7RT
----- Original Message -----
From: "Roger (K8RI)" <k8ri@rogerhalstead.com>
To: "Paul Christensen" <w9ac@arrl.net>
Cc: <rfi@contesting.com>
Sent: Tuesday, December 16, 2008 7:21 AM
Subject: Re: [RFI] Nasty RFI wiping out higher bands
>
>
> Paul Christensen wrote:
>>> We should all be writing our Directors asking for attention and action
>>> on
>>> this issue.
>>>
>>
>>
> Seems to me we should be writing the manufacturers of the devices.
>> Sec. 15.103(d) reads as follows:
>>
>> "(d) A digital device utilized exclusively in an appliance, e.g.,
>> microwave oven, dishwasher, clothes dryer, air conditioner (central or
>> window), etc."
>>
>> What exactly is "etc.?" We cannot continue to allow the drafting of
>> these
>> absurdly-constructed rules that allow anyone to fill in the blanks with
>> any
>> device they deem to be an "appliance" when such terms as "etc." are
>> written
>> into the rules.
>>
> Looks plain to me. If you have a digital device used in *anything*
>>> In the meantime, it would be very interesting to know whether a good
>>> filter (common plus differential mode) on the line cord..."
>>>
>>
>> Not on my GE Harmony washer. I tried an outboard ICE RFI filter on the
>> line
>> cord and it had zero impact on RFI. There's a lot more going on inside
>> a
>> direct-drive washer that precludes total RFI abatement. Large inductive
>> loops are used on the circumference of the washer's basin and these are a
>> source of direct RFI radiation. And even if RFI could be reasonably
>> mitigated, who wants to assume the risk of voiding their standard or
>> extended warranties by modifying the appliance?
>>
>
>> I confronted GE's two design engineers on this matter. They didn't beat
>> around the bush: They emphatically stated they had no doubt the washer
>> was
>> emitting RFI, built that their product was Part-15-exempt and as a
>> manufacturer, they are under no further duty to mitigate the RFI.
>>
>>
> No device like this is exempt. They either don't know, or are blowing
> smoke, particularly when even electric fences, and door bells are covered.
>> In my opinion, Sec. 15.103(d) should be completely removed from the
>> Rules.
>>
>> Paul, W9AC
>>
>>
> I'd go back to the dealer which is the first thing I'd have tried even
> before trying to remedy the problem with the washer and dryer, but
> forewarned is now forearmed. I wouldn't purchase any appliance without
> the understanding that if it caused interference they'd be getting it
> back. Most any reputable dealer including the big box stores will do
> this.
>
> 73
>
> Roger (K8RI)
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