Originally posted by thorpan
I'm looking to the experts in here for some antenna suggestions for OTA HDTV. We've already tried the amplified indoor antenna with very little success, so I'm now here looking for help in choosing an antenna(s) for the attic (yes, I already know.... outdoors is better).
Here's our DTV listings from CEA (61550 zipcode):
* yellow - uhf WYZZ-DT 43.1 FOX BLOOMINGTON IL 81° 14.0 28
* yellow - uhf WTVP-DT 46.1 PBS PEORIA IL 282° 6.8 46
* yellow - uhf WMBD-DT 30.1 CBS PEORIA IL 289° 5.3 30
* yellow - uhf WEEK-DT 25.1 NBC PEORIA IL 284° 5.7 57
* yellow - uhf WHOI-DT 19.1 ABC CREVE COEUR IL 292° 8.1 40
* yellow - uhf WAOE-DT 39.1 UPN PEORIA IL 314° 3.0 39
After reading most everything I could find here, it appears that the Channel Master 4228A would be a good antenna to use, but since it appears to be rather directional, would using two 4221A antennas along with a diplexer be a better choice? Perhaps someone has a suggestion for an attic sized multi-directional antenna? BTW, the CEA mileage numbers appear to be 3 or 4 miles low.
Getting the channels in the 282 - 314 degree range shouldn't be too hard, but since FOX is broadcasting the Super Bowl, well... need I say more?
Thanks in advance for any guidance you may bestow upon me.
A multi directional in the attic may give you severe multipath problems. The 4221 is still directional not as much so as the 4228. Since you are very close the 4221 will probably work fine for you and the beamwidth is wider then the 4228 and may cover the 34 degrees difference at those high signal levels. Fox on the other hand you may need to turn the antenna. As close as you are however it may come in on the backside. Yep outside it will work much better and really isn't all that big. A lot less multipath.
At your distance signal won't be a problem. Multipath may kill you. This is the reason for using the 4228 with a narrow beamwidth close in like you. Attic magnifies multipath for several reasons. Wiring in house, heating ducts, reflection of walls, floor and cieling etc... Just telling you this so if you don't get a good pix with the 4221 you know what you have to do next and yes the 4228 you'll need a rotor for it's beamwidth is about 20 degrees. The 4221 outside will probably do the job. I'm concerned with it in the attic for the reasons I've stated. I know of several attic installs with the 4221 which work fine but they are further out then you. A lot less signal strength to create multipath problems.
Not sure what you are diplexing?
You want to put the antenna on the same feed as a sat signal? OK
What else you have coming from the attic you want to diplex with?
If it's a cable TV line no can do!! They use some of the same frequencies as OTA.
You loose about 2 DB diplexing and if you are splitting it somewhere in the house to other sets you have even more loss. You should have enough signal to do so but digital is touchy. If you find you are having drop outs you may need a seperate run for the antenna or a small distribution amp. Drop outs are usually result of low signal and or mutipath problems. Make a seperate RG6 run from the antenna to be sure it's not severe multipath first. You can amplify all you want and it won't get better.
Good Luck on your quest.