[BC] Re: TIS facilities

[Robert Meuser]

Denver must have a waiver. Part 90 requires 2 mv/m @ 1.5 km.
Power or antenna efficiency are secondary.

R




Patrick Griffith, N0NNK / WPE9HVW wrote:

>There's no way a Valcom antenna has gain. I'd believe 40 watts TPO and
>10 watts ERP, but certainly not the other way around.
>-------
>Dana, I don't have a problem believing that a 60 foot top loaded Valcom
>would exhibit superior radiation compared to one of the typical 15 foot
>center loaded TIS whips. In this case the FCC apparently expressed that
>as gain. And, as I mentioned, the TIS database does provide a field for
>ERP. For background, the State of Colorado previously had a series of a
>half dozen or so 10-watt TIS stations located adjacent to each major
>artery at the point where it entered the suburban Denver metro area.
>These provided virtually no coverage in the central Denver area. And,
>when the programming changed, each had to be reprogrammed independently.
>The centrally located "40 watt" TIS replaced all of those. The higher
>power rating is intended to provide coverage over the entire Denver
>metro area from a single site - about a 12 to 15 mile radius from the
>transmitter.
>
>Patrick Griffith, N0NNK
>CBT CBNT CRO
>Westminster CO
>http://community.webtv.net/N0NNK/
>http://community.webtv.net/AM-DXer/
>
>
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