Phil, many thanks for an alternative hypothesis - I should have built a
Faraday shield around that laundry room :>)
Now that you mention that approach, the problem of the changing pitches
means that the direct pick up is in the AF area of the rig, b/c if it were
RF then the noise would not be the same on forty and 75 meters. True?
kris
Merschrod
123 Warren Road
Ithaca, NY 14850
www.merschrod.net
----- Original Message -----
From: "Phil Sussman" <psussman@pactor.com>
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Sent: Wednesday, February 03, 2010 2:45 PM
Subject: Re: [TenTec] High speed washer hum/whine
> My first thought, having a similar experience with a sewing machine, is
> to determine the input source. In my case it was NOT the power line,
> but rather DPI (Direct Pickup Interference) on an IF frequency. The
> answer I found was to filter the source and I added CAPS to the
> sewing machine to eliminate the problem.
>
> I'd look for the source at the washer and try to eliminate it there.
>
> Good luck,
>
> 73 de Phil - N8PS
>
> --------------
>
> Quoting Kris Merschrod <Kris@merschrod.net>:
>
>> Good afternoon all,
>>
>> Here is a powersupply problem that needs a neat fix.
>>
>> When my wife runs the highspeed washing machine, the whine and hum goes
>> up
>> and down and also off and on when I am on my trusty Delta II. The power
>> supply is the # 936. Grounding all around.
>>
>> When I run my old Drake, with AC-4 power supply - theer isn't a hum or
>> whine. (My gues would be the L-C filters on both neg and pos AC Lines.
>>
>> Suggestions Please.
>>
>> Kris KA2OIG
>> Merschrod
>> 123 Warren Road
>> Ithaca, NY 14850
>> www.merschrod.net
>>
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>>
>
>
>
>
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