TV Fool  

Go Back   TV Fool > Over The Air Services > Help With Reception

Notices

Reply
 
Thread Tools
Old 15-Sep-2011, 11:45 PM   #1
slackerj
A/V Squad 1967
 
slackerj's Avatar
 
Join Date: Aug 2011
Location: New York
Posts: 4
Question What am I Doing Wrong???

running a winegard hd8200u with winegard ap-8700 pre-amp. to test I have mounted it 12' on a pole aimed at mag 278. the weakest signal I am picking up is wpxn-tv 31.1. my problem is why am I not picking up wcbs-dt (2.1) or wnbc (4.1)? link to report
http://www.tvfool.com/?option=com_wr...14f320d6ff9cdb
slackerj is offline   Reply With Quote
Old 16-Sep-2011, 1:08 AM   #2
GroundUrMast
Moderator
 
GroundUrMast's Avatar
 
Join Date: Oct 2010
Location: Greater Seattle Area
Posts: 4,773
First thought is, make sure the FM trap is optioned to the "Fixed Trap In" position. Channel 28 & 33 are not usually the victims of FM interference, but if you have aviation navigation aids nearby you might be able to keep those signal at bay using the trap filter.

Your antenna is pointed right at WALK-FM and WBLI-FM each with signal levels at about -10 dBm. It may be worth adding an external FM trap just on "suspicion", to test.

After that, can you move the antenna up or down, or to another location? some times, a small change can produce surprisingly different reception conditions.
__________________
If the well is dry and you don't see rain on the horizon, you'll need to dig the hole deeper. (If the antenna can't get the job done, an amp won't fix it.)

(Please direct account activation inquiries to 'admin')

Last edited by GroundUrMast; 16-Sep-2011 at 1:20 AM.
GroundUrMast is offline   Reply With Quote
Old 16-Sep-2011, 1:18 AM   #3
No static at all
Senior Member
 
No static at all's Avatar
 
Join Date: Apr 2010
Location: Chantilly, VA
Posts: 547
I see a couple things that may be limiting reception.

First off, the 8700 pre amp is not really ideal for your situation. It is designed for far suburban/near fringe areas & is likely overloading. The net result is loss of some or all of the weakest stations as they are overwhelmed by the stronger local channels.

The 2nd thing is the close by FM stations as they may also overwhelm the preamp. The FM trap on the preamp may not be enough to address the situation. The 8200 is also a great FM antenna, which multiplies the problem.

I would start by connecting the antenna directly to 1 TV & report back your findings.
No static at all is offline   Reply With Quote
Old 16-Sep-2011, 1:36 AM   #4
GroundUrMast
Moderator
 
GroundUrMast's Avatar
 
Join Date: Oct 2010
Location: Greater Seattle Area
Posts: 4,773
The amplifier suggested back in August would have handled strong signals better, but would likely need an external FM trap between the antenna and amp input.

Quote:
Originally Posted by GroundUrMast View Post
If you are able to safely mount at 50' there is more signal available to you. A Winegard HD7698P pointing at 265 paired with an Antennas Direct CPA019 preamp will provide the networks you named plus many others.
__________________
If the well is dry and you don't see rain on the horizon, you'll need to dig the hole deeper. (If the antenna can't get the job done, an amp won't fix it.)

(Please direct account activation inquiries to 'admin')
GroundUrMast is offline   Reply With Quote
Old 16-Sep-2011, 1:37 AM   #5
slackerj
A/V Squad 1967
 
slackerj's Avatar
 
Join Date: Aug 2011
Location: New York
Posts: 4
no change

results the same without pre-amp. connected to sony bravia. maybe when roof mounted I will pick up stations. will be 10' higher
slackerj is offline   Reply With Quote
Old 16-Sep-2011, 1:39 AM   #6
GroundUrMast
Moderator
 
GroundUrMast's Avatar
 
Join Date: Oct 2010
Location: Greater Seattle Area
Posts: 4,773
Quote:
Originally Posted by slackerj View Post
results the same without pre-amp. connected to sony bravia. maybe when roof mounted I will pick up stations. will be 10' higher
10' can make a lot of difference sometimes.
__________________
If the well is dry and you don't see rain on the horizon, you'll need to dig the hole deeper. (If the antenna can't get the job done, an amp won't fix it.)

(Please direct account activation inquiries to 'admin')
GroundUrMast is offline   Reply With Quote
Old 16-Sep-2011, 1:43 PM   #7
Tower Guy
Senior Member
 
Join Date: Dec 2009
Location: Delmar, NY
Posts: 1,195
Quote:
Originally Posted by GroundUrMast View Post
Your antenna is pointed right at WALK-FM and WBLI-FM each with signal levels at about -10 dBm. It may be worth adding an external FM trap just on "suspicion", to test.
That's a good suggestion. Also tune the variable trap to 90.1, WUSB.
Tower Guy is offline   Reply With Quote
Old 17-Sep-2011, 12:47 AM   #8
slackerj
A/V Squad 1967
 
slackerj's Avatar
 
Join Date: Aug 2011
Location: New York
Posts: 4
Thumbs up sucess

put the rig up on the roof today and after I scanned for channels there they were. cbs (2.1) and nbc (4.1). that ten feet made the difference .
slackerj is offline   Reply With Quote
Reply

Bookmarks

Go Back   TV Fool > Over The Air Services > Help With Reception


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off




All times are GMT. The time now is 12:04 PM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Copyright © TV Fool, LLC