[dontech]

I finally got a chance to put in a plumb pole in cement for single sat 72.7. I am using a dish 500 with a single lnb in the 119 slot. I have good results and am getting 6 -7 degree higher than the single dish 300 that I had in the same spot ( non cemented). Signals are now in the high 50's to low 60's which is good for my area. I wanted to set the skew at 92 ( which is 1000.4) but the interesting thing was that after I set my az and elevation, I would rotate the skew around 25 degrees and noticed the signal strengths increased. There was a point in the rotation where there was no gain. Does anyone know why this happened? Thanks

 

[boba]

I finally got a chance to put in a plumb pole in cement for single sat 72.7. I am using a dish 500 with a single lnb in the 119 slot. I have good results and am getting 6 -7 degree higher than the single dish 300 that I had in the same spot ( non cemented). Signals are now in the high 50's to low 60's which is good for my area. I wanted to set the skew at 92 ( which is 1000.4) but the interesting thing was that after I set my az and elevation, I would rotate the skew around 25 degrees and noticed the signal strengths increased. There was a point in the rotation where there was no gain. Does anyone know why this happened? Thanks

Skew is only important if you are looking at multiple satellites it helps correct for the multiple locations. Using the "Y" yoke you are offsetting the LNB location so skew may make a slight difference if you are metering the movement. You should really use the "I" adapter and put your LNB at the center of the dish focal point, to use the 20" dish 500 at full potential.

 

[Michael P]

The Dish 500 was never designed for Eastern Arc reception, so you would not be able to get 77 along with 72.7 no matter what the skew.

If you are using the 500 as a single orbital slot the skew is 0.

 

[P Smith]

I finally got a chance to put in a plumb pole in cement for single sat 72.7. I am using a dish 500 with a single lnb in the 119 slot. I have good results and am getting 6 -7 degree higher than the single dish 300 that I had in the same spot ( non cemented). Signals are now in the high 50's to low 60's which is good for my area. I wanted to set the skew at 92 ( which is 1000.4) but the interesting thing was that after I set my az and elevation, I would rotate the skew around 25 degrees and noticed the signal strengths increased. There was a point in the rotation where there was no gain. Does anyone know why this happened? Thanks

it's happen because your initial aiming wasn't precise

skew angle doesn't matter for you; just replace Y to I yoke and make final adjustment

 

[dontech]

Thanks everyone -- I will replace the Y with and I and see if this helps. I have single dishes for 61.5 and 72.7 right now with no dish for 77 since locals are not yet on 77. My line of site is restricted for a 1000.4 dish because of the trees. Could my skew issue be related to the position of the pole in the ground and I am compensating for a narrow line of site?

 

[P Smith]

Only theoretically; movement of LNBF by changing the skew angle is miniscule to repositioning by height on the must, or relocation of the dish's mast.