[RFI] Tower Intermod - Control Lines

Jim Brown jim at audiosystemsgroup.com
Thu Jul 22 10:04:40 PDT 2010

On Thu, 22 Jul 2010 07:36:55 -0500, Ed Richardson wrote:

>I am now convinced it is something local, either on my tower or
>something weak that the antennas up top can hear but I can not detect at
>ground level.

Understood. Do you have an HF rig (or can you borrow one) that you can put 
in your car or hand carry around the neighborhood looking for peaks in 
signal strength?  My Kenwood TH-F7A is not sensitive enough on the HF 
bands to be of use, but one of the little 5W QRP rigs is small enough to 
hand carry and plenty sensitive enough to do the job. All you need is an 
antenna. Something like a Ham Stick and mag mount would work on a car if 
you don't have a mobile antenna already. Once you get close, you can think 
about a loop to triangulate on it. 

73, Jim K9YC

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