QC - Quebec (outside Montreal, Gatineau, Eastern Townships) - OTA - Canadian TV, Computing and Home Theatre Forums
 

Go Back   Canadian TV, Computing and Home Theatre Forums > Canadian Internet, Phone, TV and Wireless Service Providers > Over-The-Air (OTA) Digital Television > OTA Reception Results

Digital Home Helpful Information

Reply
 
Thread Tools Search this Thread Display Modes

Old 2010-12-14, 08:54 PM   #1
FranKllr
 
Join Date: Sep 2009
Location: Shawinigan, QC
Posts: 84
Lightbulb QC - Quebec (outside Montreal, Gatineau, Eastern Townships) - OTA

Hi,

I need advice for post-transition problem. This is for my grand-mother. She is living countryside and right behind a mountain. Only VHF appear to get through. She only watches CKTM-TV CH13 (SRC) and want to continue. Problem is after transition, it will go to CH28! She has a corner yagi (I don't know brand/model) on a tower. Is there anything to do? Or would it be possible to try for CBVT-DT CH12 (SRC)? After transition it is suppose to double its power...

TVFool
http://www.tvfool.com/?option=com_wr...da32fc54bc6e24
Topographic map.


Thanks!
FranKllr is offline   Quick reply to this message
Sponsored Links
Advertisement
 
Old 2010-12-14, 10:17 PM   #2
downbeat
Moderator
 
Join Date: Jul 2003
Location: Calgary
Posts: 3,704
Default

Do you already receive CBMT-1 on Channel 28 currently? If you do, it might be a feasible catch as a post-transition DTV station.
In any case, you might as well try for CBVT-DT now — Radio-Canada recently got CRTC approval to maintain its current ERP and HAAT for that station.
http://www.crtc.gc.ca/eng/archive/2010/2010-849.htm
downbeat is offline   Quick reply to this message
Old 2010-12-14, 10:57 PM   #3
FranKllr
 
Join Date: Sep 2009
Location: Shawinigan, QC
Posts: 84
Default

Can only receive VHF, so channel CH8 and CH13, rest don't make it through. Someone 2 km to the south, but in front of the Church with a indoor antenna (temporally setup, I made the holl_ands's "UHF+Hi-VHF Bowtie-In-Loop") was able to get 8, 13 and 45 but not 28.

About CBVT-DT, Industry Canada data suggest it could go from currently 2450 to 4900.

I guess CBVT-DT is the only hope to get SRC.
FranKllr is offline   Quick reply to this message
Old 2010-12-14, 11:16 PM   #4
downbeat
Moderator
 
Join Date: Jul 2003
Location: Calgary
Posts: 3,704
Default

CBVT's ERP could go as high as 4.9 kW if CBC/SRC wanted, but as the link above suggests, they aren't going there.
downbeat is offline   Quick reply to this message
Old 2010-12-15, 11:26 AM   #5
mille
 
Join Date: Mar 2008
Location: (1)montréal/Mile End (2) Lac Masson
Posts: 1,088
Default arrow uhf antenna

May be her best hope will be to install a UHF arrow style antenna (exterior)
like the one i installed at the cottage in the Laurentians
HD-9032 (UHF Only) + a pre-amp

and you turn the antenna to catch the signal, may be channel 28 is bouncing at a nearby mountain.
Did great for me
It will be easier to aim the antenna when the signal will be digital, with the signal meter of the TV or the converter box...
mille is offline   Quick reply to this message
Old 2010-12-15, 09:46 PM   #6
stampeder
OTA Forum Moderator
 
Join Date: Jan 2005
Location: North Delta, BC (96Av x 116St)
Posts: 24,037
Default

FranKllr do you have a photo of her antenna?
stampeder is offline   Quick reply to this message
Old 2010-12-16, 07:28 PM   #7
FranKllr
 
Join Date: Sep 2009
Location: Shawinigan, QC
Posts: 84
Default

No. I will try to take one this weekend.
FranKllr is offline   Quick reply to this message
Old 2010-12-30, 05:30 PM   #8
FranKllr
 
Join Date: Sep 2009
Location: Shawinigan, QC
Posts: 84
Default

I went there today. Here are the photos. There are actually two antennas there.



FranKllr is offline   Quick reply to this message
Old 2010-12-30, 06:02 PM   #9
tvlurker
Veteran
 
Join Date: Jul 2005
Location: Craig Henry (Greenbank/Hunt Club), Nepean, ON
Posts: 3,012
Default

It's hard to tell from the picture if the antennas are higher than the trees.
According to the TVFool, your grandmother should be able to get the Trois Rivieres UHF stations with those types of antennas, assuming there aren't nearby trees in the way.

Some ideas:

1. Is it possible that your grandmother's TV is in "Cable" or "CATV" mode. That would make UHF appear to not work, since the channels above 13 are mapped differently.

2. From the picture, it looks like she's got 300 ohm twin lead. The twin lead may have deteriorated, and/or the connection may have come loose at the antenna or combiner. Replacing this with RG-6 cable and a preamp/combiner with 300 ohm inputs and a 75 ohm output should help a lot.

3. Is there a rotor on the tower? It's hard to tell from the picture. If so, you'd need to rotate to get CBVT-DT. If not, you'd need to turn the antenna(s), and then you'd probably lose out on the T-R stations.

Good luck. That's a pretty impressive set of antennas there. Others more versed in commercial antenna design can probably identify the specific models.
tvlurker is offline   Quick reply to this message
Old 2010-12-30, 06:10 PM   #10
stampeder
OTA Forum Moderator
 
Join Date: Jan 2005
Location: North Delta, BC (96Av x 116St)
Posts: 24,037
Default

That giant, boombastic lower one is a Delhi-Jerrold VHF/FM and was considered one of the top DXing antennas of the 1970s-'80s. If you take it down someone would probably think about buying it, but if you keep it you can clean it up, straighten all the elements, and check/repair any problems and then put it up again.

The top one looks to be a fairly common Winegard/Antennacraft/Radio Shack model (same one sold by all three) or similar, but there are much better choices now, especially the Antennas Direct 91XG. If you are able to build your own antenna I'd suggest a DBGH to really grab the distant UHF signals. Judging from the map you gave, it seems to me that the UHF antenna should still be able to "see around" that mountain's edge.

Which ever UHF you choose, put it up at the top of the pole and aim it for CBMT-DT Channel 28 in Trois-Rivières, then re-install that big VHF below it and aim it for CBVT-DT Channel 12 in Quėbec City, then combine their outputs. I agree that fresh cabling would be a must. This is all assuming that it is safe to go up that tower and that the cost suits her budget.

Last edited by stampeder; 2010-12-30 at 06:28 PM.
stampeder is offline   Quick reply to this message
Old 2010-12-30, 08:55 PM   #11
FranKllr
 
Join Date: Sep 2009
Location: Shawinigan, QC
Posts: 84
Default

The rotor is broken or just jammed into the trees. Those trees are the only one around. In direction of CBMT-DT (trois-riv.), there is a field of maybe 200+ meters, then tree + mountain. Direction of CBVT-DT (qc) is clear.

I will check TV settings next time. I think they are good.
There is the coax cable, a box then it goes into TV. If this is an Amp, could I just remove that? There is only 1 TV plugged to the antennas.

Ok, I will verify if that tower is safe to climb. Trim the trees, change cable, add pre-amp and turn the Delhi-Jerrold to Québec. That will be a good start. But I won't do it in winter, will have to wait for spring.

Thanks a lot guys
FranKllr is offline   Quick reply to this message
Old 2010-12-30, 09:34 PM   #12
Betamax
 
Join Date: Mar 2010
Location: Québec, QC
Posts: 974
Default

I think that you will need to wait until CKTM-TV 13 analog is shutdown, because it can cause adjacent interference with CBVT-DT 12.
Betamax is offline   Quick reply to this message
Old 2010-12-31, 01:57 AM   #13
tvlurker
Veteran
 
Join Date: Jul 2005
Location: Craig Henry (Greenbank/Hunt Club), Nepean, ON
Posts: 3,012
Default

I wouldn't presume that 13 would interfere with 12 on that monster antenna. They're at about 75 degrees apart from each other, and that's likely to provide at least a 30dB null towards 13 when pointed towards Quebec's channel 12. According to TVFool , there is only about a 34dB difference between them, so I don't think 13 analog will be a problem with that antenna.
tvlurker is offline   Quick reply to this message
Old 2010-12-31, 02:46 AM   #14
stampeder
OTA Forum Moderator
 
Join Date: Jan 2005
Location: North Delta, BC (96Av x 116St)
Posts: 24,037
Default

Yep, look at all the directors on that big VHF antenna - that means that it has an extremely directional beamwidth. That's what made it so popular as a DXing antenna.
stampeder is offline   Quick reply to this message
Old 2012-01-19, 02:57 PM   #15
MageMinds
 
Join Date: Sep 2003
Posts: 79
Default QC - Estrie, Centre-du-Quebec

I tried to find this thread, but I failed, probably because there aren't many English channels is this area. Anyways I decided to start one!

But I'm looking for an answer about a problem I have with CKMI-DT-2 RF 11 located in Sherbrooke. Since yesterday morning I can't seem to see the channel, my USB tuner can't lock on the channel like there are nothing on that channel. Maybe the antenna got damaged during the wind storm of the night of January 17? I'd like to know if I'm the only one.

I'm located in Centre-du-Quebec with LOS to the Sherbrooke transmitting tower, I used to receive CKMI-DT-2 100% according to my USB tuner. Now... nothing.

I also had trouble with CKSH-DT, they had signal but no program in it, but that problem is now gone.

Adding to that CIVS-DT was completely down too, live CKMI-DT-2, but has now been repaired.

What's happening to CKMI-DT-2, please confirm I'm not alone in the dark.
MageMinds is offline   Quick reply to this message
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Canadian TV, Computing and Home Theatre Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -4. The time now is 06:33 AM.

OTA Forum Sponsor


Search Digital Home

Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.