Fw: [TenTec] Omni D and electrical noise from house wiring

[Michael O. Hyder]

Replied to Jason, but this may interest others. . .

73 de Mike

----- Original Message -----
From: Michael O. Hyder
To: Jason Reber
Sent: Thursday, April 22, 1999 1:24 PM
Subject: Re: [TenTec] Omni D and electrical noise from house wiring


Had a similar problem caused by a neighbor's 'touch lamp,' one of those
devices where you touch it to turn it from off to dim to bright.  You can
read about that at:

http://home.naxs.com/n4tn/noise.html

My friend's URL (where that is posted) is:

http://home.naxs.com/n4tn/

He is N4TN and I am N4NT.  Confusing, no?

Good luck, Mike N4NT@wireco.net
  ----- Original Message -----
  From: Jason Reber
  To: tentec@contesting.com
  Sent: Thursday, April 22, 1999 11:15 AM
  Subject: [TenTec] Omni D and electrical noise from house wiring


  I wonder if anyone has had a similar problem:

  I am using an Omni D with a 252 power supply, and run an MFJ antenna tuner
and RG-58 coax to a remote switchbox, which then selects 1 of 5 dipole
antennas. I have the rig grounded to a cold water pipe nearby.  I find that
on 30 and 40 Meters, especially in the evenings, I get patches of very loud
electrical noise, which covers about a 10 KHz portion of the frequency. It
just comes in, seemingly out of nowhere, lasts for 4 or 5 minutes, and then
moves up or down the band several KHz.  One time when the noise came in,
destroying my QSO, I inadvertently turned off one of the lights in my shack
(there are 2 light circuits in the room, and one in the hall nearby). The
noise suddenly disappeared. I turned the light back on, and it came back. I
then turned off the other light in the shack, and the noise disappeared
again. Then I tried turning the hall light off (it was on at the time), and
the noise came back!
  The strange thing is, turning lights on and off in other parts of the
house, including those not even on the same breaker, seem to affect the
noise. The noise doesn't show up on 10, 15, or 80 meters near as bad. I also
found that the noise will show up on my old Hallicrafters S-76 receiver if I
tune it to the same freq. as my Omni D. Also strange is the fact the turning
off and on lights doesn't eliminate the noise- it just causes it to move
several KHz up or down the band.
  Does anyone have and idea on what could be causing this?

  I really appreciate the knowledge and help often found on this reflector.
  Thanks,
  Jason   KA7UAM


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