Spectrum shift - Canadian TV, Computing and Home Theatre Forums

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post #1 of 5 (permalink) Old 2018-02-22, 02:49 PM Thread Starter
Join Date: Nov 2017
Posts: 29
Spectrum shift

So- i have built the ff4 as well as the ff6 for this repack- however, these antennas (genius) seem to be smoke shows out of the gate, then two weeks later the performance falls off. Is this just me ?
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post #2 of 5 (permalink) Old 2018-02-22, 04:02 PM
Join Date: Nov 2008
Location: San Diego, CA
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Thanks for the Kudos.....I think....

Antenna Pointing Angle can change at anytime after your feet hit the ground.....esp. with wind....

Non-LOS, Long Range Propagation varies due to a variety of reasons, such as Thermal Profile due to Weather (similar to Sonar Refraction thru Water) that can shorten or extend range; as well as Ground Conductivity (Snow, Ice, Water); Trees (worse with leaves & when Wet)....and when Troposcatter modes are involved can vary quite a bit over time scales of minutes, hours, days...up to months....so YMMV....a LOT....
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Antenna Simulations, Overload Calculations, etc: http://imageevent.com/holl_ands
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post #3 of 5 (permalink) Old 2018-02-23, 05:47 PM Thread Starter
Join Date: Nov 2017
Posts: 29
Thank you Sir for your input it is always greatly appreciated. I’m just having a difficult time coming to terms with that I suppose last year I was pulling in 66 channels regularly and reliably through the day and night - now I’m stuck at seven ... I have been through everything a dozen times to the point where I’m pulling my hair out . Do you recommend going for an LPDA? In which I cut a dipole for every channel I want to receive and considerate a driven element. I was thinking of having two- The channels I wish to receive are in Portland and Boston unfortunately so 180° apart theoretically speaking with a horizontal reflector behind these L PDAs with this work?
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post #4 of 5 (permalink) Old 2018-02-23, 06:45 PM
Join Date: Jan 2009
Posts: 405
Ota did you try a new balun, my daugter called me month or so ago saying , her antenna was not working could only get one station, I changed the balun , all her stations came back , it's was one of the store bought balun, that had two capacitors I figured one cap had shorted out , didn't bother to test it , still got it mite clip the caps off see if it works ,it's just setting in my stuff to check out box.
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post #5 of 5 (permalink) Old 2018-02-23, 08:50 PM
Join Date: Jun 2011
Location: 43° N, 81.2° W
Posts: 6,429
Water ingress, corroded connections and broken connections can cause a significant decline in signal strength. There is not much can be done except check the entire installation and perform repairs or replacements as required. Baluns, connectors and cables with water damage must typically be replaced.
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