Antenna Aiming - AVS Forum
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post #1 of 6 Old 11-26-2012, 05:25 PM - Thread Starter
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According to antennaweb the tv station broadcast antennas are at 271 deg (vhf 9-1) and 217 degrees (multiple UHF stations). Aiming antenna towards either direction maximizes antenna strength for that station but cuts strength in half for others. I use a channel master 4228 with a preamp mounted in the attic. Any suggestions.
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post #2 of 6 Old 11-26-2012, 05:46 PM
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Go to tvfool and post your results ( your address will not be shown). It is more accurate than antennaweb.

But right off the bat, putting the antenna outdoors rather than in the attic would most likely yield better results.
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post #3 of 6 Old 11-29-2012, 04:21 AM
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^ +1 ^
That model, no doubt is a 4228HD imported under the CM name, not the original 4228A that was made by CM. If that one station is VHF, this is a UHF only antenna unlike the original.
Other than turning it, add a 2nd VHF antenna for that VHF station assuming that is a physical channel number you gave.

Abundant OTA television is what makes this country different from all others. Lets keep it this way.
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post #4 of 6 Old 11-29-2012, 12:12 PM
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baldheadjim: Can't address your question until you post the Results URL (webaddress) after you enter your location in www.tvfool.com to calculate your signal strengths and angles.

================================================
FYI: Although old CM4228 and newer CM4228HD aren't particularly GOOD Hi-VHF antennas,
they DO provide significant Gain on most Hi-VHF Channels, although SWR varies from Good
to very poor, depending on channel. They may be all some people NEED. Note that RF Combiner Mod changes these characteristics and may be better or worse for a situation:
http://imageevent.com/holl_ands/multibay/8bayrefl

PS: DIY M4 (or nearly DIY Kit from mclapp) Super-4-Bay is even better for both UHF and Hi-VHF:
http://imageevent.com/holl_ands/multibay/4bayrefl
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post #5 of 6 Old 11-29-2012, 03:53 PM
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It is the nature of the beast. The 4228 has a very narrow horizontal beamwidth, which is useful with multipath problems, but not helpful when your two azimuths are 54 degrees apart. The 4221 has a much wider horizontal beamwidth.

http://www.hdtvprimer.com/antennas/cm4228az.gif

http://www.hdtvprimer.com/antennas/cm4221az.gif

Do you still live in Pooler, NW of Savannah?

http://www.tvfool.com/?option=com_wrapper&Itemid=29&q=id%3dcc4918bf10cbfe

You also have another VHF channel on CH11 that is on an azimuth between the two you mentioned.

WSAV might be causing preamp overload.

If you can not measure it, you can not improve it.
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www.megalithia.com/elect/aerialsite/dttpoorman.html
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post #6 of 6 Old 11-30-2012, 10:12 AM
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One possible solution might be to aim an Antennas Direct C5 VHF antenna between WTOC-DT real CH11 and WVAN-DT real CH9 and combine it with your 4228 aimed at 217 for UHF.

http://www.solidsignal.com/pview.asp?p=c5&d=antennas-direct-c5-clearstream-5-high-gain-digital-vhf-tv-antenna-(clearstream5)

http://www.antennasdirect.com/cmss_files/attachmentlibrary/Combining%20C5%20and%20UHF%20Powerpoint_2.pdf

http://www.antennasdirect.com/cmss_files/attachmentlibrary/C5_%20technical_%20data_%20with_uhf.pdf

http://manuals.solidsignal.com/C5-assembly-instructions.pdf

We can't tell you any more without an accurate exact address tvfool report (including antenna height) from you. The address will not show in the report.

If you can not measure it, you can not improve it.
Lord Kelvin, 1883
www.megalithia.com/elect/aerialsite/dttpoorman.html
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