On Sat, 2010-02-06 at 17:55 -0500, Phil Sussman wrote:
> It is most interesting this post has received the multitude of responses that
> it
> has without some feedback.
>
> Since the washer is a newer type and it has been plugged in (we assume)
> properly, the idea of grounding issues only serves to discuss the possible
> means
> of coupling the generated source (from the Dryer) into the radio. The known
> fact
> this does NOT affect an older Drake unit serves to reinforce the
> belief that the source is more from the electronics - dc (if DC) motor brushes
> or other source. My thought is we're dealing with harmonics of a conversion
> inverter.
>
> This can be easily verified by an oscilloscope and filtered accordingly at the
> source.
>
> Having seen such issues before, may I suggest contact with the customer
> service
> department of the company that supplied the washer. Believe it or not, they
> may
> be having a violation of FCC Part 15 regarding their electronics. If so, and
> the
> washer is new -- a warranty solution, eh?
Trane has had that kind of a problem with variable speed furnace fans
and has supplied a filter to fix the problem.
>
> Forgive the excessive bandwidth.
>
> 73 de Phil - N8PS
>
> -----------
73, Jerry, K0CQ
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