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Re: [TowerTalk] 20m Noise

To: "'Todd Coulter'" <>, <>
Subject: Re: [TowerTalk] 20m Noise
From: "Tim Duffy K3LR" <>
Date: Sun, 16 Nov 2008 20:50:37 -0600
List-post: <">>
A great place to help sort out RFI, noise and CFL issues is the RFI

Check out the RFI Archives through

The RFI reflector is at

Tim K3LR

-----Original Message-----
[] On Behalf Of Todd Coulter
Sent: Sunday, November 16, 2008 8:44 PM
Subject: [TowerTalk] 20m Noise

I have been having a constant (24/7) noise level of S-4 on 20m. This
noise sounds like what I would describe as white noise. It is constant
at all times of day and no matter which direction I turn the beam. I do
not have this noise at all on 10m or 15m (I currently do not have
anything active for below 20m) which use the same triband beam. 

I have cut all of the power to my house and the noise is still present.
I am presently using a W2DU current balun on the beam. I do not recall
any significant event that I would have thought could cause this type of
problem. Could this be caused by a faulty balun or other issue with the
antenna or is this type of noise just the norm for 20m?? I do not recall
this kind of noise always being present on 20m but I can not recall when
it started.

In between the radio and amplifier and between the amplifier and tuner
are RadioWorks T-4 line isolators. Also used is an Ameritron RCS-4
antenna switch and polyphaser protector. 

Any help or suggestions will be greatly appreciated. 


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