Lost Channels
Hi,
I'm using a homemade bow tie antenna in my attic for about 5 years now in Paradise, PA 17562 During the summer months I would get about 15 channels, including grit 15.1 and comet 15.2 As the trees started to shed their leaves I would pick up a few more channels. About 2 months ago I lost grit, comet, escape 49.?, decades 3.2 instead of gaining some channels. Checked the antenna and wiring and all looks OK About a week ago I got 3.1 fox? and 3.2 decades and 15.1 is now comet (not grit) and no 15.2 Still no grit. I didn't move the antenna yet. Any thoughts?? Thanks, Angelo |
Welcome to the forum, Angelo
Here is a zip code TVFool report for your area, but your actual location might be different. http://www.tvfool.com/?option=com_wr...60ed1f6c5589cc Please do a report based on your exact address for greater accuracy; your exact address will not show in the report. Please give us the link to the report that is in bold type near the top of the report. You can do it here: http://www.tvfool.com/index.php?opti...pper&Itemid=29 You have given us virtual channel numbers. What we need are callsigns and real channel numbers. The problem is that the subchannels you want come and go from the main network channels. They are often hard to track down, but we will try. An added problem is that TVFool is using a defective database, so the reports often have errors, but we can make comparisons with reports from other sites. |
Here's a link to my report
http://www.tvfool.com/?option=com_wr...60ed71b2ba5770 And yes, stations come and go and show up at different channels. Or disappear altogether. Angelo |
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Thank you for the report; here is an extract:
http://forum.tvfool.com/attachment.p...0&d=1515874840 this report is from rabbitears.info: http://forum.tvfool.com/attachment.p...1&d=1515875021 and for comparison, this report is from the FCC DTV map site; it uses 30' antenna height: http://forum.tvfool.com/attachment.p...1&d=1515875145 |
This is what is on WGAL real channel 8 and 49:
http://www.rabbitears.info/market.ph...&callsign=wgal 8.1 NBC 8.2 MeTV Real channel 8 is a VHF-High channel. A UHF bowtie antenna doesn't work very well on VHF-High unless the signal is very strong. An attic location for an antenna and trees make TV signals weaker. Are you using a preamp? WPMT now on real channel 36: http://www.rabbitears.info/market.ph...&callsign=wpmt 33.1 PBS 33.2 PBS Kids 43.1 Fox 43.2 Antenna TV WXBU: Comet (WXBU) is moving to a new frequency on December 29, 2017 at noon. http://local21news.com/features/comet-move/comet see WHP on real channel 21, will move to real channel 32 http://www.rabbitears.info/market.ph...h&callsign=whp 15.1 Comet 21.1 CBS 21.2 MyN 21.3 CW KJWP on real channel 2 which is a VHF-Low channel; very big antenna elements needed for it http://www.rabbitears.info/market.ph...&callsign=kjwp 2.1 MeTV 2.2 Grit 2.3 Escape 2.4 Heroes & Icons 2.5 Retro TV KYW real channel 26, moving to 30 http://www.rabbitears.info/market.ph...h&callsign=kyw 3.1 CBS 3.2 Decades |
No preamp
8.1 NBC, 8.2 MeTV, 15.1 grit, 15.2 comet, 3.2 decades, 49.4 escape, 43.1 fox had the best reception for a couple of years. Now they're all over the place if at all. |
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It is the real channel number that determines what antenna is needed. VHF-Low, real channels 2-6 VHF-High, real channels 7-13 UHF, real channels 14-51 The virtual channel number (like 5.1) is a holdover from the analog TV days to maintain the identity of the station, and is what the TV displays. |
I can see that now.
My antenna is at around 290* but Grit is at 87*. So I'll never pick it up now. I'll scan every once in a while and see how it goes. I'll also get a preamp. I'd hate to have to use an antenna with a rotator. That's a real PITA Angelo |
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https://www.rabbitears.info/search.p...=Grit&sort=dma Tell me more about your bowtie antenna. Maybe it can be improved. What are its dimensions? Does it have a reflector? Can you show us a photo? Grit is on KJWP on real VHF-Low channel 2, that is in a different direction. You could build a simple antenna for it that could be aimed at 87 degrees to see if you can pick it up. If you connect that antenna alone to your TV and you can pick it up, it could be easily combined with your bowtie antenna with a HLSJ combiner and you wouldn't need a rotator or an A/B switch. http://forum.tvfool.com/attachment.p...1&d=1486829832 Channel 2 is 54 to 60 MHz. The center of the channel is 57 MHz. 5540/57 = 97 inches for a halfwave dipole If you can't find 300 ohm twin lead, you can use some 14 gauge solid copper electrical wire for a folded dipole: http://forum.tvfool.com/attachment.p...3&d=1515947209 If the folded dipole for channel 2 is almost, but not quite, good enough, you can add a director and a reflector to convert it into a 3 element beam: http://forum.tvfool.com/attachment.p...4&d=1515948372 |
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2 hooked together in attic at 280*
I have a spare I'm not using Attachment 3038 Attachment 3039 Attachment 3040 |
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Thank you for the photos.
The dimensions are pretty close to correct, but when you fasten the wires to wood without any insulators there will be some signal loss. Also, a reflector on just one antenna would give at least as much gain as two antennas without reflectors. http://forum.tvfool.com/attachment.p...2&d=1515973532 How did you combine the two antennas, a splitter in reverse? When you combine two antennas that have wire baluns, the is a 50% percent chance of getting it right, because the two antennas must be connected in phase to have any gain over just one. http://forum.tvfool.com/attachment.p...3&d=1515973999 |
''How did you combine the two antennas, a splitter in reverse?''
Yes What do I use for a reflector? Do I need to use the dipole or can I put reflectors on the two in the attic, face one at 280*, the other at 87*and join them with a combiner? Can I use small pieces of wood as insulators? I don't have any test equipment. Off Topic......Going to hospital tomorrow for pre-op tests for total knee replacement Feb 6. Got denied this surgery last year because of heart problems. Now have defibrillator. |
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Did you try reversing the leads on just one balun to see which way gives the most gain? When the baluns are not connected in phase the main lobe of the combined antennas splits in two: http://forum.tvfool.com/attachment.p...4&d=1515978897 Quote:
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Antenna elements must be a certain length for each channel frequency for best results. It's like organ pipes; short pipes are for the high frequency notes and the pipes are long for the low frequency notes. Quote:
http://forum.tvfool.com/attachment.p...5&d=1515980568 http://forum.tvfool.com/attachment.p...6&d=1515980740 http://forum.tvfool.com/attachment.p...7&d=1515980774 http://m4antenna.eastmasonvilleweather.com/index.html http://m4antenna.eastmasonvilleweath...0Drawings.html https://sites.google.com/site/maycre...setup/mclapp-4 Quote:
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Great info.
I can do all you mentioned but not for a few days. Is the reflector the same height and width as the antenna? Angelo |
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http://forum.tvfool.com/attachment.p...8&d=1516040976 I modified one for a friend to make it safer to handle in his attic. I put wood molding corner strips on the edges of the 1" x 2" wire mesh reflector: http://forum.tvfool.com/attachment.p...9&d=1516042075 and black heat shrink tubing and thread protector caps on the ends of the whisker elements to keep from getting scratched: http://forum.tvfool.com/attachment.p...0&d=1516042099 |
Nice Work!!
I'll start on this in a few days. |
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