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Thread: OTA with antenna possible?
- 12-08-2011 06:54 PM #31
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I learned something about extra coax about 2 years ago.
My cable from the satellite ran from the back of the house to the east side, into the attic then back to the rear center of the house where my old 622 was located.
The signal was OK but I knew a shorter run would definitely get me a stronger signal, so I bored a hole through the brick and drywall and came right in near the living room TV.
My 25 ft if pre fab coax ended up about 10 ft too long anyway - the run is now about 15 ft instead of the previous 60, so I coiled the excess up behind the TV in the corner.
Well, to my chagrin, the signal actually was worse than before, so I started messing around with the cable and when I uncoiled the loop in the corner.
The signal jumped way up.
What I had inadvertently done with the coil of coax in the corner was create a choke coil that severly dampened the signal.
The moral is to use the correct length of coax and don't coil any up anywhere it may very well kill your signal strength.
A messt random snake of cable is better than a neat ciol in the corner.Last edited by Jim5506; 12-08-2011 at 06:59 PM.
Hitachi 57F59; Sony VHP-D50Q - 7' diag on wall
DishNetwork ViP722k; DishNetwork ViP211; DishNetwork ViP211K; DishNetwork 301; 2 - TiVo Series 2's; Accurian 6000; Samsung SIR-T351; Panasonic Showstopper 2000; ATI HDTV Wonder; Hauppauge HD PVR;
Sony PS3; Toshiba HD-A3 HDDVD; SlingBox AV
Dish 1000 on 110,119&129; Dish 500 on 61.5
RS U75-R; Funke PSP.1922
- 12-08-2011 06:54 PM # ADS
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- 12-12-2011 02:41 PM #32
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I have to have a coil on ours for a drip coil.
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- 12-12-2011 02:56 PM #33
One loop = no problem.
Many loops = many problems.Reunite Pangaea!
- 01-16-2012 09:48 AM #34
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Thanks to how the DISH setup has to be with our OTA installation I was thinking of something this weekend: Since a preamp requires AC power to boost the signal, and since we have DISH with a diplexer to stack both tuners on one cable, would it be possible to use a flat coax cable (like what is used in apartment installs) to still be able to run the AC adapter inside our house? So it would look like this: pre-amp installed on the antenna mast. Cable runs to the preamp diplexer. Diplexer to the diplexer for our DISH install on one side, and diplexer to the flat cable which is ran into our house via a window and connected to the AC adapter. Would this work? I do have the option of running the AC adapter outside, but because our house we are renting is so old there are no outlets outside the only outlet I have is on the light fixture by our door. Running an AC adapter there would look quite funny.
I've been looking at the Antennacraft 10G212 as our antenna is an Antennacraft. Which is better: the Antennacraft 10G212 or the Channelmaster CM7777?Last edited by Neutron; 01-16-2012 at 10:01 AM.
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Jason
- 01-16-2012 10:50 AM #35Used channel master preamps for years but got the antennacraft 10g212 when everything started going digital.Use it with a 4bay uhf antenna and honestly it works great.It has more gain than the cm 7777 which in my case (deep fringe) certainly helped.I've been looking at the Antennacraft 10G212 as our antenna is an Antennacraft. Which is better: the Antennacraft 10G212 or the Channelmaster CM7777?
- 01-16-2012 02:46 PM #36
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Is the piece that has the AC adapter on the Antennacraft preamp rated to be used outdoors?
I'm thinking of running the power cord wire under our window so that I can plug it in inside our house. The coax connectors I would mount right by the diplexer.Click here if you have benefited from satelliteguys.us
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Jason
- 01-17-2012 06:29 PM #37
I do not recommend using a diplexer as they are very lossy. If needed use a flat cable to pass the cable under a window. You can use a flat cable between the pre-amp and power supply. The Pre-amp power supply should be installed inside and not outdoors.
A drip loop is fine, a coil of cable can be a problem.
I prefer the CM-7777, but have not tried the Antenna Craft amp.Last edited by Larry1; 01-17-2012 at 06:35 PM.
- 01-17-2012 07:14 PM #38
Diplexers are used all the time and have very low loss since the signal is seperated into frequency bands, almost the entire desired signal is directed properly.
Hitachi 57F59; Sony VHP-D50Q - 7' diag on wall
DishNetwork ViP722k; DishNetwork ViP211; DishNetwork ViP211K; DishNetwork 301; 2 - TiVo Series 2's; Accurian 6000; Samsung SIR-T351; Panasonic Showstopper 2000; ATI HDTV Wonder; Hauppauge HD PVR;
Sony PS3; Toshiba HD-A3 HDDVD; SlingBox AV
Dish 1000 on 110,119&129; Dish 500 on 61.5
RS U75-R; Funke PSP.1922
- 01-17-2012 11:14 PM #39No it's not,designed for indoor use only.That's not to say you couldn't rig something up to cover it though.As long as it stayed dry it should be fine.One of those old primestar plastic boxes would work.Is the piece that has the AC adapter on the Antennacraft preamp rated to be used outdoors?
- 02-17-2012 06:44 PM #40
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Got my preamp installed (Antennacraft 10G212). This is odd though, I redid my antenna setup to bypass any DISH diplexers and switches. I have it running from my antenna to a grounding block, to a flat piece of coax running under my window to get inside the house. From there I have a cable running to the power supply for the preamp. Power supply to the OTA module on my 722k. The red LED is lit. I have now lost 15 points on my signal for my strongest station. Nothing else comes in. If I disconnect the preamp at the antenna and connect the coax straight, I go back to 100 on my strongest station and I pull in the other 3 sets of locals in the 65 range for CBS and FOX (didn't get that one before) and 75 for NBC.
I have messed with the gain and messed with the FM Trap button (what does In and Out mean on that button)? Sometimes the ABC station (my strongest) on the preamp where it was at 85, would occasionally drop completely and come back.
Do I have a faulty pre-amp?Click here if you have benefited from satelliteguys.us
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Jason

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