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KB2VXA > HDTV 11.10.11 13:35l 33 Lines 1415 Bytes #999 (0) @ WW
BID : 8074_VK6ZRT
Read: GUEST
Subj: Re: VK6BE > Big Switch
Path: IZ3LSV<IK6ZDE<IK2XDE<DB0RES<ON0AR<UA6ADV<ZS0MEE<VE3UIL<VK6ZRT
Sent: 111011/1221Z @:VK6ZRT.#BUN.#WA.AUS.OC #:8074 [Boyanup] $:8074_VK6ZRT
From: KB2VXA@VK6ZRT.#BUN.#WA.AUS.OC
To : HDTV@WW
Hi Bob and all,
Siting of the transmitter has nothing to do with antenna polarization but
at least you answered the question. Engineers from very early on have
known that horizontal gives greater range watt for watt which is why TV
in North America started out that way and continued well into the 1980s
when it started giving way to circular. Eventually antennas need
replacement so that's what they did when the time came. Now VHF, UHF TV
and FM are circularly polarized.
Now you might want to put a bug in the GM's ear, circular not only
doesn't care about receiving antenna orientation but it also helps cut
down multipath distortions. That's why it works well in urban areas with
those ubiquitous rabbit ears and monopoles, with FM it has another clear
advantage, mobiles are vertical so they don't need two antenna bays and a
power divider on the tower.
Hmmm, something else in common here, UHF TV translators. I've seen pretty
much what you describe in Reading, Pennsylvania. There are several atop
Mt. Penn relaying Philadelphia stations that come in crappy or not at all
in the Scuykill Valley. (Have fun pronouncing THAT one.) Then there is
cable but I don't live there so how would I know? (;->)
73 de Warren
Station powered by JCP&L atomic energy, operator powered by natural gas.
Message timed by NIST: 12:11 on 2011-Oct-11 GMT
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