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Old 2-Nov-2016, 1:40 AM   #41
rabbit73
Retired A/V Tech
 
Join Date: Aug 2012
Location: S.E. VA
Posts: 2,747
Quote:
To recap, based on recommendations from here I installed the following winegard hd7698p antenna and Channel Master CM-7777 Titan 2 Antenna Preamplifier. Then I was unable to get any stations so it was suggested that I remove the pre-amp I did this and now I get the following

06-1 6.3 WRGB-HD CBS "CBS 6"
06-2 6.4 this TV This TV
06-3 6.5 Comet Comet TV

10-1 26.3 WTEN-HD ABC "WTEN"
10-2 26.4 WTEN-SD GetTV
10-3 26.5 LWN Justice Network

13-1 WNYT-HD
13-2 WNYT-ME
13-3 WNYT-WX
We first suggested the 7698, but then we all suggested the all-channel Winegard HD7084P antenna to be certain you would receive WRGB. Fortunately, you are able to receive WRBG with the 7698 even though it isn't designed for VHF-Low, because it is your strongest channel.

The 7777 should have worked; here's the math:
WRGB -58.5 dBm = -9.5 dBmV
Max input 7777 = 15 dBmV
Estimated gain of 7698 for VHF-Low = < 10 dB
WRGB -9.5 dBmV + 10 dB ant = +0.5 dBmV; preamp OK
WRGB -58.5 dBm + 10 dB ant + 30 dB preamp = -18.5 dBm; tuner OK

If the 7777 didn't work, it means
1. There is an unknown source of overload
2. The preamp was defective
3. It wasn't getting voltage because of a bad connection
4. There was a splitter between the preamp and the power inserter that was not power passing
5. You were using two amps in series that would overload the tuner

Quote:
I also still get 2-1,2-2,2-3, and 2-4 out of utica NY.
What direction was used for the antenna aim for these tests? WKTV 2.1 is in a different direction.
Quote:
But, I do not get 17-1, 17-2, and 17-3 out of Schenectady which is between my home and Albany, these are the PBS stations
WMHT PBS is on real channel 34 and has co-channel interference from WIVT on the same channel. Co-channel interference is indicated by the red highlighted "a" by a callsign in your report.
Quote:
Also, 23-1, 23-2, 23-3 which is FOX, Horse Racing and Laff. I do not really care about horse racing or laff but I would like to get FOX.
WXXA Fox on real channel 7 has co-channel interference from WBNG CBS on the same channel.

If you could figure out the preamp problem, I think you would do a little better, but your location isn't a good one for OTA reception.

Is the coax grounded with a grounding block?
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Last edited by rabbit73; 2-Nov-2016 at 1:26 PM.
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