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KENC had one transmitter on a 40 foot tower and another on a 100 foot public water tower. Both installations were cited by the same FCC inspector on 2 different occasions. Caution and forethought should be exercised when planning an installation of a Part 15 AM transmitter on top of an elevated metallic surface or structure
True, but KenC also stated:
” We had one of our 3 around town Hamilton’s atop a high school football stadium three feet from the metal roof over the stadium grounded to it. It was acceptable to the FCC inspector that cited us for the other two that were on towers.
So, he was only cited for attaching to radiating structures – correct?
The problem with the school installation was that we got very poor range with it. The roof had a 5 degree pitch for water to run off and we found that it acted as a directional deflector. …”
And later said..
“..Though you don’t get as much range without the ground connected at 40′ it does work and it does work well enough for the effort. It’s my feeling that in the Pacific Northwest, unless you are willing to disconnect your ground and put it up high, you will get cited.
And then his last statement just answered one of my questions!
I’ve read it before but missed it!…
One other way is set it atop your house roof, attach it to your metal vent stack and ground it there.”
So now that I have an idea what to ground the transmitter to.
There is still the question of the ground plane..
Can I legally construct a ground plane under the transmitter, as long as it is not connected to it? And if so, does it matter how I ground that?
By the way, the bookmark I got those quotes from is http://groups.yahoo.com/group/Rangemaster-Transmitters/message/2397