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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!=20
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.=20
Does anyone have and idea on what could be causing this?
I really appreciate the knowledge and help often found on this =
reflector.
Thanks, =20
Jason KA7UAM
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<DIV><FONT color=3D#000000 size=3D2>I wonder if anyone has had a similar =
problem:</FONT></DIV>
<DIV><FONT color=3D#000000 size=3D2></FONT> </DIV>
<DIV><FONT color=3D#000000 size=3D2>I am using an Omni D with a 252 =
power supply,=20
and run an MFJ antenna tuner and RG-58 coax to a remote switchbox, which =
then=20
selects 1 of 5 dipole antennas. I have the rig grounded to a cold water =
pipe=20
nearby. I find that on 30 and 40 Meters, especially in the =
evenings, I get=20
patches of very loud electrical noise, which covers about a 10 KHz =
portion of=20
the frequency. It just comes in, seemingly out of nowhere, lasts for 4 =
or 5=20
minutes, and then moves up or down the band several KHz. One time =
when the=20
noise came in, destroying my QSO, I inadvertently turned off one of the =
lights=20
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=20
back. I then turned off the other light in the shack, and the noise =
disappeared=20
again. Then I tried turning the hall light off (it was on at the time), =
and the=20
noise came back! </FONT></DIV>
<DIV><FONT size=3D2>The strange thing is, turning lights on and off in =
other parts=20
of the house, including those not even on the same breaker, seem to =
affect the=20
noise. The noise doesn't show up on 10, 15, or 80 meters near as bad. I =
also=20
found that the noise will show up on my old Hallicrafters S-76 receiver =
if I=20
tune it to the same freq. as my Omni D. Also strange is the fact the =
turning off=20
and on lights doesn't eliminate the noise- it just causes it to move =
several KHz=20
up or down the band. </FONT></DIV>
<DIV><FONT size=3D2>Does anyone have and idea on what could be causing=20
this?</FONT></DIV>
<DIV><BR><FONT size=3D2>I really appreciate the knowledge and help often =
found on=20
this reflector.</FONT></DIV>
<DIV><FONT size=3D2>Thanks, </FONT></DIV>
<DIV><FONT size=3D2>Jason KA7UAM</FONT></DIV></BODY></HTML>
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