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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