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Old 10-Sep-2018, 2:06 AM   #10
rabbit73
Retired A/V Tech
 
Join Date: Aug 2012
Location: S.E. VA
Posts: 2,747
From niv by PM:

Quote:
Originally Posted by niv
Wow, didn't see the post that Joe put up for me. I wish I could participate. Here is a clean link to my report

http://www.tvfool.com/?option=com_wr...90386d3aea6f11

The address you used was in the neighborhood but a little ways away. Yes the PA is Juice. I guess Lime is as type of juice. I haven't been able to read the thread in depth, will be doing that first thing tomorrow morning. Thought the FM trap was interesting. Sounds like I might ought to put the Lime/Lemon/Juice back in. I did some home run, cable upgrades today from DA to mission critical locations. Channel 3 (24) came back so it made a difference.

Here is the connection diagram

Without PA
7698 - coax RG6 50' DA
A. coax RG6 37' dual splitter to Hopper & LG TV
B. coax RG6 23' SiliconDust HDHomeRun Extend
C,D,E,F doesn't matter

With PA
7698 - coax RG6 3' - PA - coax RG6 50' - PowerInserter - Attenuator - DA. I have the Power/Attenuator/DA connection with double female connectors so no cable between them.

I don't have a ground block, sounds like I should have one. Should that be on the tower ground or the home ground. The tower has it's own ground stake.

I was planning on putting the antenna back up this week but will hold off to try out some of the suggestions coming. THANK YOU FOR YOUR INPUT. Please give the others my thanks and tell them I'm now aware of the thread, I'm reading and plan on following suggestions.
Thank you for the additional information.

I think the coax should be grounded with a grounding block connected to the house electrical system ground for electrical safety and to help reject interference.

Please let me know if you can see the images I posted: a map in post #2 and 2 reports and 2 terrain profiles in post #9. In the past, a poster who was not yet able to post could not see images derived from an attachment. If you can't see them, I can show them another way using my image host.

In your case, you need to do all of the modifications suggested for optimum results. A preamp is needed because your signals are weak, an FM filter is needed to reduce FM interference, and grounding the coax is needed to reject interference. If you leave any one of them out, you reduce your chances for improved reception.

You mention an attenuator after the power inserter. How many dB is it and why is it there?

A corrected FM report shows KHOT FM at -14.0 dBm instead of -13.7 dBm; still very strong.
http://www.fmfool.com/modeling/tmp/6...2/Radar-FM.png
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Last edited by rabbit73; 10-Sep-2018 at 3:15 AM.
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