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<blockquote data-quote="a33" data-source="post: 1069071" data-attributes="member: 332642">What I would do, even with a new dish:Check if the top and bottom string towards the LNBfeedhorn match the offset angle of the dish (ass measured through dish hight and dish width).That is easy to measure; if needed I can put it in my calculator for you.I've seen enough instances where the feedhorn position didn't match the offset angle of the dish.You could also measure depth of the dish at the center and (let) calculate focal distance and all; but that is more difficult. If feedhorn position matches offset angle, that might be overdone.Are the channels you are missing (mostly) from 28.2 east or from 28.5 east? That would give an indication if the tweaking should be eastwards or westwards. Even on 70cm dishes, I found the difference between the two satellite position noticable.For tweaking skew on difficult to get satellites, I usually try to find the zero-reception on the opposite polarity of a transponder. So, setting the transponder polarity from V to H, or vice versa. Often the range around zero is smaller and more precise than the range around maximum reception.Greetz,A33Edit: Don't forget to tweak LNB-distance, so sliding the LNB more towards and from the dish. That could also help.And tweak on a weak transponder. It is the weakest transponders that you want to improve, and hopefully by doing this you get also a few not-yet-received transponders. <img src="https://www.satellites.co.uk/styles/default/xenforo/smilies/smile.png"&nbsp; class="smilie" loading="lazy" alt=":)" title="Smile&nbsp; &nbsp; :)" data-shortname=":)" /></blockquote>

[QUOTE="a33, post: 1069071, member: 332642"] What I would do, even with a new dish: Check if the top and bottom string towards the LNBfeedhorn [B]match the offset angle[/B] of the dish (ass measured through dish hight and dish width). That is easy to measure; if needed I can put it in my calculator for you. I've seen enough instances where the feedhorn position didn't match the offset angle of the dish. You could also measure depth of the dish at the center and (let) calculate focal distance and all; but that is more difficult. If feedhorn position matches offset angle, that might be overdone. Are the channels you are missing (mostly) from 28.2 east or from 28.5 east? That would give an indication if the tweaking should be eastwards or westwards. Even on 70cm dishes, I found the difference between the two satellite position noticable. For tweaking skew on difficult to get satellites, I usually try to find the [B]zero-reception[/B] on the [B]opposite polarity[/B] of a transponder. So, setting the transponder polarity from V to H, or vice versa. Often the range around zero is smaller and more precise than the range around maximum reception. Greetz, A33 [I]Edit: Don't forget to tweak LNB-distance, so sliding the LNB more towards and from the dish. That could also help. And tweak on a weak transponder. It is the weakest transponders that you want to improve, and hopefully by doing this you get also a few not-yet-received transponders. :)[/I] [/QUOTE]

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