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08-30-2005, 06:13 PM
| | SatelliteGuys Regular | | Join Date: Aug 17th, 2005
Posts: 56
| | | How important is Skew for a Dish 500 Install... thinking of using a VOMM Dish
The VOOM dish I have does not have skew plate. I want to move 110 and 119 from the SuperDish to the smaller VOOM dish, as I am decommissioning the SuperDish. I have bought the DPP Twin LNBs, and the Y Adapater. The question is, if don't skew the dish, what is going to happen? I am on 97W Longitude. The books call for a skew of 115 degrees. Can anyone with a Dish500 tell me which way a skew of 115 will incline the dish from the vertical? I am assuming 25 degrees, but to the right or left, looking from the back of the dish?
The VOOM dish is 24"x27" quite larger than the Dish 500. So will it provide adequate signal without skewing, from both satellites?
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08-30-2005, 06:34 PM
| | SatelliteGuys Regular | | Join Date: Oct 14th, 2004
Posts: 712
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I hope that works for you!
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08-30-2005, 06:48 PM
| | SatelliteGuys Freshman | | Join Date: Aug 29th, 2005
Posts: 37
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skew of 115 will turn it to the right, just like your superdish was
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08-30-2005, 08:48 PM
| | SatelliteGuys Junkie | | Join Date: Oct 24th, 2003 Location: Michiana: South of the Border
Posts: 1,585
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If your Dish500 skew is 90 it isn't important at all. Otherwise you do need to skew the dish. Without skew you will be pointing high for one satellite and low for the other. You will most likely be able to get only one satellite without skew.
JL
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08-31-2005, 12:50 AM
|  | Supporting Founder | | Supporting Founder Join Date: Feb 29th, 2004 Location: Florissant, CO
Posts: 5,689
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I didn't think that V* dishes were that big, but oh well.
I say just use a Dish500 pan - they're basically free.
BUT, if you must continue down this road, as the others have posted, skew is just an angle for the arm. Un-plumb the mast the proper amount. Without a complete understanding of the geometry invlved, this is non-trivial. Experienced installers can mount a mast at all sorts of odd angles and compensate on the fly, but it takes a touch, and without a skew plate, it'd be a real PITA.
__________________
Simple Simon
"It's not enough to do what's best. You must do whatever is necessary." -Winston Churchill
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2 Vip622: May, 2006. DP-Twin=110/119, DP Single=129 into a DP34.
Philips 60" RPTV, DELL 22" LCD, Sony 6.1 sound system.
Formerly: DishDVR 921: Feb., 2004. DVR 501: sometime last century. |
08-31-2005, 12:18 PM
| | SatelliteGuys Regular
Topic Starter
| | Join Date: Aug 17th, 2005
Posts: 56
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They are basically free? How so?
Also, on the SuperDish, the 119 LNB is several inches from the 110 LNB. On Dish 500, they are right next to each other, say may be 2" inches between center of circles. Skew in not important for circular polarized signals, so, we are talking about signal focal points. So, I will be about 0.46" off optimal focus point for each satellite ( x = 2" x tan(25 deg), half of that off for each satellite ). Since neither LNBs can be right at the focal point to begin with, I may be OK.
I will keep you posted.
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