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[TowerTalk] Mountain top multi tower QTH

Subject: [TowerTalk] Mountain top multi tower QTH
From: Grant Saviers <>
Date: Tue, 13 Jul 2010 20:03:54 -0700
List-post: <">>
We all dream of that perfect site - 1000' above all else for 360 
degrees.  I found such a site, but so did 6 or so commercial 
tower/transmitter operators before me.  The towers range from 100 to 
250', from guyed to freestanding, from VHF to microwave stuck all over 
the height with sidearms.  Three are high power FM/TV, multi-tenant 
master antennas that have stations with ERPs of several 100 kw, maybe 
one at 1000kw.  These are about 200' away and start at 150' up and my 
quick research indicates at least 6 FM broadcast transmitters.  It 
doesn't appear that there are any AM/HF transmitters from the antenna 

So is this worth taking a harder look, or is it hopeless for ham HF 
operation?  Some of the questions that come to mind are:

1. Can I put up a guyed tower (e.g. 90') with a swing arm stack? (county 
codes are ok)  Can the other tower owners/licensees stop me?  What if my 
tower affects their permitted pattern?
2. How much filtering will I need?  I can imagine building a Faraday 
cage ham shack for about the cost of a top of the line rig and filtering 
everything in/out.
3. If I filter enough so my receiver isn't totally overloaded in the HF 
bands, will the transmitter to transmitter IMD products get me?  Or misc 
rectification or phase noise?
4. There are other residences within a few hundred feet.  Where can I 
find the field exposure calculations for these transmitters? 5. Is there 
an index to licensees if I know the tower lat/lon?


Grant KZ1W


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