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
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?
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