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Old 20-Jun-2020, 11:25 PM   #4
rabbit73
Retired A/V Tech
 
Join Date: Aug 2012
Location: S.E. VA
Posts: 2,747
Quote:
Originally Posted by RG6er View Post
Hello.

The UHF channels come in fine as they are high power. Even some of the low power UHF come in good. My reception issues lies with the VHF low power repeater. The call sign is K10PV-D and it broadcasts on RF CH 10. Here is my TV Fool report

http://www.tvfool.com/option=com_wra...90380875532a88
Hello, RG6er; welcome to the forum.

The link to your TVFool report doesn't work; there is one character missing, a "?" before option. I think this is your report:
http://www.tvfool.com/?option=com_wr...90380875532a88

As OTAFAN mentioned, TVFool reports have become less accurate because of a defective database used to generate reports and many changes from Repack by the FCC. Here is a report from rabbitears.info based on your TVFool report. I don't have your exact address, but I think it's close:
https://www.rabbitears.info/searchma...tudy_id=110137



You can do your own report here:
https://www.rabbitears.info/searchmap.php



Quote:
RF CH 10 channels sometimes comes in fine randomly throughout the day. All of a sudden it will pixelate, freeze and lose signal altogether.
As OTAFAN also suggested, it could be a problem with the channel 10 transmitter. It might be useful to talk to the K10PV-D station engineer, if you can find him. K10PV-D is a translator for KSBY. Do you know anyone in your area that is also trying OTA that could tell you if they are having a problem with channel 10?

If there is no transmitter problem, then there must be a problem with your antenna system. Both of your antennas have the same problem, and both have just a dipole for VHF. It could be that a dipole doesn't have enough gain for that VHF-High channel, but you said you tried an HD7694P antenna which has a lot more gain for channel 10. The new instructions for the 7694 are confusing because they don't agree with the image of the antenna. The VHF-High section of the 7694 is an LPDA (Log Periodic Antenna) that must have the elements unfolded correctly for full gain.

The other possible causes of your problem are trees in the signal path or electrical interference which will reduce the SNR of the channel 10 signal. Electrical interference is higher on VHF than on UHF.

This spectrum analyzer scan made with a $22 USB dongle and free open-source spectrum analyzer software shows electrical interference noise bad enough to cause a problem with VHF-High reception:

Attached Images
File Type: jpg RG6erTVF-KSBY1.1_1.jpg (120.0 KB, 1608 views)
File Type: jpg RG6erTVFreportRE2.jpg (242.6 KB, 1630 views)
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Last edited by rabbit73; 21-Jun-2020 at 1:51 AM.
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