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TVI
Mar 2, 2003 12:47:01 GMT -5
Post by YG862 on Mar 2, 2003 12:47:01 GMT -5
OK all you guys who are much wiser in this hobby then I am, help please. When I started in cb in '76 and till I got out of it in the early 90's I never had a TVI problem unless I was running the Maverick 250 and then only on ch2. Now that I'm out in the country and basiclly have no neighbors to bother I have the audio from the radios getting into the TV, computer, and home theater. The computer & home theater are no problem, I just turn 'em off. The picture side is ok unless I have the amp on & then it's only slight lines. However Betty does not like my voice competeing with the dialog on the TV show she is watching. I have a low pass filter and it does not help. Suggestions
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TVI
Mar 2, 2003 13:39:40 GMT -5
Post by DoubleDeuce on Mar 2, 2003 13:39:40 GMT -5
OK here goes.All your equipment should be grounded to a ground rod.Good 95% shielded coax.Is your equipment in the same room as your TV?You can install filters on your TV and stereo.Also how high is your antenna.Usually the higher your antenna is the less TVI you will get.A lot of the problems are caused by cheap filtering in TV and stereo equipment.Of course if you have monster audio on your station none of this may help much.All you can do in that case is try cutting back your modulation while she is watching TV.Or just go snuggle till she is done.LOL
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TVI
Mar 2, 2003 18:22:06 GMT -5
Post by YG748 on Mar 2, 2003 18:22:06 GMT -5
Howdy YG862, Double Deuce is correct. A good ground will sometimes take all the RFI out. If you have a sat dish or TV antenna, make sure your radio antenna is above them. The higher, the better. If you have cable TV, stay higher than the cable coax going into your house. Good coax, like Roger stated, with low loss and a high percentage of shielding (95% or better) and a low swr might solve your problem. Good luck.
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TVI
Mar 2, 2003 20:43:08 GMT -5
Post by YG862 on Mar 2, 2003 20:43:08 GMT -5
OK here we go:My antenna is at 50'. I have the best Belden coax I could buy and my swr's are just about flat. I don't have the radios grounded so I guess I will try that and maybe hi pass filters on the TV. All radios are in the basement and the TV is up stairs. Rog as for your last suggestion that is where I am at this point.
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TVI
Mar 3, 2003 6:45:20 GMT -5
Post by YG897 on Mar 3, 2003 6:45:20 GMT -5
Another thing you need to check is that your coax isn't close to your TV or Satelite antenna wire as well as the phone line.
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TVI
Mar 3, 2003 8:42:16 GMT -5
Post by YG862 on Mar 3, 2003 8:42:16 GMT -5
Ron, the sat dish is mounted low on the other side of the house. The radio coax is a straight run into the radio roon & not near the TV coax. The antenna is at 50' and is a 24' Imax and it is grounded. You should sea that puppy dancing in the wind today. ;D I would install the radial kit if I thought that would help with this problem and maybe improve the signel a little.
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TVI
Mar 3, 2003 9:07:37 GMT -5
Post by YG748 on Mar 3, 2003 9:07:37 GMT -5
Hmmmm......RF is a strange thing. If your antenna is grounded to a good ground rod, I would try the LEAST expensive solutions and work your way up. I also have a sat dish and my mobile really tears it up. I ran a inline RFI/TVI filter for a few months and it worked. I am not suggesting you go buy one unless it is the last resort because they don't always work. If you know someone that will loan you one to try, that would be the best route. Filters on your phone lines and sat reciever MIGHT help but you will still have a problem with the stereos. I know people that spent a lot of money to reduce the amount of interference comming into their house that NEVER had any luck . Did you try grounding the radio and amp?
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TVI
Mar 3, 2003 9:48:23 GMT -5
Post by YG862 on Mar 3, 2003 9:48:23 GMT -5
I'm gonna ground the radios as soon as the weather allows me to do it. Now that you mention it my mobile gets in the tv audio too. Betty says she can hear me loud & clear through the tv as soon as I turn in the drive way. I should mention that It's a bare foot radio. The radio audio is not getting into the telephones. Think I am gonna try a filter at the tv. I'll let you know if that helps. Thanx everyone. Barry
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TVI
Mar 3, 2003 10:08:17 GMT -5
Post by YG748 on Mar 3, 2003 10:08:17 GMT -5
Barefoot radio bleeding through?! You might want to take a walk around you house. Just a thought, but have you checked the grounds on your sat dish? Also check your electrical ground at your main breaker box. Some older homes like mine (built in 1926) had very poor wiring with virtually NO grounding. Like I said, just a thought.
I have to get out of here!! I'm two hours late for work!! If I'm lucky, the boss will fire me! lol!!
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TVI
Mar 3, 2003 14:17:22 GMT -5
Post by YG238 on Mar 3, 2003 14:17:22 GMT -5
Some important suggestions have already been posted. First, the ground from your service drop should be to a metalic water pipe, or a ground rod. The phones will have a grey box outside with a solid wire that connects to the same ground, usually with a yellow tag on it. If either are missing call the utility provider, that part belongs to them. There are things in that grey box called "carbons" if they are worn out you will get RF in there. I drove a 6 foot, home made ground rod for the antenna & radios. Get 6' of 1/2" type K OXY/MED copper pipe, smash, and fold one end over, drill several 1/8" holes in it. Fill it with rock salt, this will make it super conductive. I ran 8 Ga. from my mast, and 12 Ga. into the shack, grounding every chassis to it via a lug terminator like those used for the neutral in your breaker box. I offed the old 46Mhz coardless phones for the new 900Mhz. Computer speakers that are amplified, are connected to the soundcard with cheap "zipcord". The amp in the speaker is FCC approved for RF, the soundcard likewise, there are no laws pertaining to the wire that hooks the two. Go to the Radio Shack and get some shielded microphone cable along with the necessary connectors, same with any remote audio system., shield the inputs. I have a book that is excellent on the subject, try these things, if they fail, I'll either, scan portions of it, or mail it to you, and you can return it when your through. In closeing, my equipment is in the same room with 2 computers with 4-1 surround speakers, a cheap chineese TV, and 2 900Mhz phones, not to mention the livingroom entertainment system on the other side of a 4" wall. I have no TVI problems at 1200 Watts. I treated TVI like the boogie man, I searched him out. Hope this Helps,
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TVI
Mar 3, 2003 14:48:23 GMT -5
Post by DoubleDeuce on Mar 3, 2003 14:48:23 GMT -5
Hes crazy as a loon and sleeps hanging upside down in his closet wearing a beenie but he sure has some good ideas.LOL
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TVI
Mar 3, 2003 20:16:24 GMT -5
Post by YG862 on Mar 3, 2003 20:16:24 GMT -5
Lots of good ideas here. What really scares me is that the description you gave of P makes me think he and I would get along really well. ;D
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TVI
Mar 3, 2003 21:58:19 GMT -5
Post by YG748 on Mar 3, 2003 21:58:19 GMT -5
OK............NOW I'm getting scared!!
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TVI
Mar 3, 2003 22:23:11 GMT -5
Post by YG238 on Mar 3, 2003 22:23:11 GMT -5
OK OK , but the beanie is a super U237 Space Modulator. During the day, while standing, the convexity of the U237 shields me from foriegn transmissions. At night, hanging upside down , the concaved shape focuses the RF from my leader to a special transponder deep inside my, what used to be, brain. I did have one until I had to act a fool to get Ya'll to post on the board. HEHEHE It's working!!
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TVI
Mar 3, 2003 23:02:59 GMT -5
Post by YG748 on Mar 3, 2003 23:02:59 GMT -5
Apparently you really did loose your mind. It is a well known fact that the U237 Space Modulator is a ray gun carried by a little martain that wore a push broom atop his helmet. He also had a stupid dog whose name escapes me right now. Anyway, the martain wanted to take over the world but NASA sent Buggs Bunny to the moon to bump him off. EVERYBODY KNOWS THAT!! DAAAAA!
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