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<p style="margin-bottom: 0in; line-height: 100%">Hi Allen!</p>
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<blockquote type="cite"
cite="mid:mailman.120.1550959627.1689.mythtv-users@mythtv.org">
<pre class="moz-quote-pre" wrap="">The performance of that antenna for WHBF is probably close to your wet
noodle which is probably a good thing as it is so close and could otherwise
overload any preamp. This antenna has about 10dB gain where you care and is
similar to the Winegard I linked. If it meets those specs it is probably
fine. That same company makes a DB4 which has about 14dB gain. The
boresight bain is the gain on axis so where your antenna is pointing.
Did you say the antennas are in the attic? There is a trend around here to
have roofing plywood with aluminum on it. If you have that definitely move
the antenna up on the roof. You would also benefit by adding height so if I
followed this thread correctly I would get a pole and chimney mount or post
mount and get the thing out of the attic.</pre>
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<p style="margin-bottom: 0in; line-height: 100%">Thanks for the info
– FWIW Winegard’s Burlington, IA, facility is about 80 miles SSW
of me – trivia for the Small World Dep’t. </p>
<p style="margin-bottom: 0in; line-height: 100%">The DB2 antenna
specs are listed as “range of 1-30 miles and high gain of up to
11.4 dBi”. Next line says “multi-directional (pulls in signals
from many directions)” which from the thread discussions could be
causing multipath problems when windy. OTOH could be signal
disruption as the poor electronics go on a roller coaster ride to
get
here The ‘performance data’ and ‘boresight gain’ were
extracted from the DB2 antenna’s detailed spec sheet.</p>
<p style="margin-bottom: 0in; line-height: 100%">And yes, the
antennae are in the attic. I don’t think there is any aluminum in
the sheathing nor other than the flashing. Have tested with the
antenna outside on the deck and did not make any difference. Well,
no difference as far as signal reception; there were ‘relationship
differences’ ==> “how long is <u>that</u><span
style="text-decoration: none">
going to be outside?!”. <whimper!> So appears to be no
</span>Faraday Cage issues. </p>
<p style="margin-bottom: 0in; line-height: 100%">Barry</p>
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