OTA: West Coast DXing Tropo, Atypical Reception - Page 3 - Canadian TV, Computing and Home Theatre Forums

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post #31 of 42 (permalink) Old 2014-06-26, 03:51 AM Thread Starter
 
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Dx weather forecasting

Here's a handy tropo forecast site that predicts when atmospheric conditions will be favourable for dx'ing and has coverage maps:
http://www.dxinfocentre.com/tropo_wam.html
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post #32 of 42 (permalink) Old 2014-06-26, 01:33 PM
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Yep, we've been recommending that site for years, and Mr. Hepburn is a member here at our site too. We can observe the Southern Quebecois and Southern Ontarians get all those wild tropo blasts through the hot summer but we just don't get them much here on the west coast.



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post #33 of 42 (permalink) Old 2015-01-24, 09:01 PM
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Arrow OTA: Ocean Tidal Effects Upon Reception

I have about 5% available time reception of KCPQ-DT (13) from near Dunbar using a 10 element yagi and a Research Communications 9267 preamp. The TV Fool profile here is 2 Edge. Watching this over a period of time on a spectrum analyzer one I see why. The signal has variable fading as the tide rises and falls - not surprising since about 150 km of this shot is over sea water. There is also fading variation related to layered air masses at different temperatures. This is usually destructive [except for those rare tropo ducting events (temperature inversions), the good times, when this station hits 10 bars]. During the over-the-earth fade there is a reduction of "clean" signal and all that remains is the troposcatter signal - always present at a fairly consistent low level. I have not yet been able to achieve HD reception from any troposcatter signal - so it acts like a noisy floor that you have to be 15 dB above with a clean signal to get HD reception. That is, for me, 5% of the time when the over-the-earth paths are in phase and the 2 Edge path is dominant. Good for Sea Hawks and Mariners games; excellent news and weather; but many of the syndicate programs (like Modern Family) can be found on other stations.
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post #34 of 42 (permalink) Old 2015-01-25, 03:29 AM
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That's an awesome analysis, westsider, good work! This may serve OTAers on Canada's West coast to understand certain variable-signal issues seen when DXing.

For our members, westsider is located in the City of Vancouver.



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post #35 of 42 (permalink) Old 2015-07-22, 01:42 AM
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As this is the summer there are tropo ducting openings from time to time. Sometimes the high signal strengths, and distances traveled, truly amaze. But all too soon the party is over. My interpretation of the TV fool term "tropo" is tropospheric scatter which is a mode once relied upon in the "good" old analog TV days for that deep fringe snowy picture that old timers fondly remember. I have not (yet) successfully received an ATSC of HD picture over troposcatter. However, those not too distant TV fool tropo listings do become good candidates for tropo ducting when a temperature inversion takes place.
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post #36 of 42 (permalink) Old 2015-07-22, 10:35 PM
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The best times for tropo for me in Coquitlam is late summer after a very warm day and the nights are a little muggy and start to cool. Usually around late August early September.
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post #37 of 42 (permalink) Old 2016-02-08, 12:32 AM
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Today was a great day for dxing in Coquitlam. I am in a high rise building on top of a hill in Coquitlam, and usually I can get about 18 stations (a couple not working properly right now such as 12.3). If I put my amplified Terk antenna (Silver Sensor Clone)on the balcony facing south, I can usually get 7.1,.2,.3 and less often but quite regularly 13.1,.2,.3. and much more rarely I can get Komo 4.1,.2. While I was setting up to watch the Super Bowl on Kiro 7.1 I did a scan and got 34 channels. A number of them were religious such as TBN 20.1,.2,.3,.4,.5, and this number is with very few of the locals as I was pointed straight south (locals being Seymour channels and Bellingham channels). I got Kong hd and sd, Kwok 42.1, Kuns 51.1,.2 (both in Spanish) and even KING which is very rare came in with 5.1,.2. There were several other channels which I was going to examine later, but they weren't there when the Super bowl was over. 34 is definitely my highest number of channels.
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post #38 of 42 (permalink) Old 2016-02-08, 04:01 PM
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And sure enough a lovely, warm, sunny weather front came in from the south, so this is tropo in action!



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post #39 of 42 (permalink) Old 2017-02-22, 01:21 AM
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anyone in Calgary Able to pick up US TV stations? Montana/WA state?
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post #40 of 42 (permalink) Old 2017-06-06, 11:43 PM
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Today was another day for good reception in Coquitlam. With my amplified Terk HDTVa antenna high up in my building (on my balcony) I got 35 US stations today. 4.1 KOMO,.2 Comet, .3 Charge; 5.1 KING, .2 Lockdown; 7.1 KIRO, .2 Get TV, .3 LAFF; 9.1 KCTS, .2 Kids, .3 Create; 11.1 KSTW, .2 Through the Decades; 12.1 KVOS, .2 Movies, .3 Heroes and Icons; 13.1 KCPQ, .2 This TV, .3 Escape; 24.1 SBN, .2 Jewelry; 28.1 KBTC, .2 NHK, .3 W, .4 TVW; 46.1 KUSE, .2 ONTV4u, .3 SBN, .4 Shop TV, .5 Shop LC, .6 QVC, .7 Beauty; 51.1 KUNS, .2 TBD; 56.1 KWDK. I didn't find where all these stations are from, some are regular but some I have not received before and some I usually get weren't there (like five religious ones I normally get during this kind of reception but won't watch). I also receive 9 Canadian channels when I turn my antenna around, but I didn't include the regular Canadian ones. Most of these were from either Seattle area or from the Bellingham area, but I am not sure of the rest.
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post #41 of 42 (permalink) Old 2017-06-25, 12:18 AM
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Tonight , Saturday June 24 has been the best for me ever. I got 60 channels over the air, some of them appeared strange until I realized that I had two 28.1's for example (this was a direct from Seattle and from Bellingham rebroadcasters). Eight channels were repeaters this way, that still led to 52 different channels I hadn't had before. Add to my last reply, 16.1 KONG; 22.1 KZJO (Joe tv), .2 Fox (Q13 repeat), .3 ANT; 33.1 ION, .2Qubo, .3 Ion Life, .4 shop, .5 QVC, .6HSN, .7 TLMD; 44.1 Evine, .2 AZTECA, .3 AAT tv, .4 KBS, .5 COZI tv, .6 Metv; 66.1 CHNU
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post #42 of 42 (permalink) Old 2018-10-19, 08:16 PM
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Today I put my Terk amplified Silver Sensor clone on my balcony and pointed it south, I got 51 channels, many of them .1,.2,.3,.4,etc. but that is my highest count so far. The sad to me thing is that many are either religious or shopping of some sort. There were also quite a few that were things like Comet, Charge, Ant.tv, Justice, Quest, Decades, Movies, Me Tv, H&I, Grit, This tv, Escape, and a few that I am not sure of what they program like AAT TV, ONTV4U, and 3 channels had colour bars but identified themselves as some of the channels already covered. Channel numbers I got were 4.1,.2,.3-5.1,.2,.3-6.1-11.1,.2,.3-12.1,.2,.3,.4,.5-13.1,.2,.3,.4-16.1-20.1,.2,.3,.4,.5-22.1,.2,.3,.4-24.1,.2,.3,.4-28.1,.2,.3,.4-44.1,.2,.3,.4-46.1,.2,.3,.4,.5,.6,.7-51.1,.2,.3-56.1. These don't include the local channels that I would get if I rotated my antenna around by 130 or so degrees and pointed more towards Mt. Seymour. I did this today the 19th of October at around 4.00pm.
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