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| Thread ID: 101201 | 2009-07-05 03:28:00 | Freeview Dish measurements | Driftwood (5551) | PC World Chat |
| Post ID | Timestamp | Content | User | ||
| 789052 | 2009-07-05 03:28:00 | I've been searching the net & these pages for some info. The arm holding the LMD on my dish got blown by the frost. I have repaired it but need to get it re-aligned corectly on the dish. I have found specs for my particular dish but don't know to apply them. For example where exactly is the focal point measured from? Just how critical is the alignment? I guess what I am looking for is a picture of a dish, showing where the various angles & measurements apply. I have posted this on some freeview forums but havent been swamped with help. |
Driftwood (5551) | ||
| 789053 | 2009-07-05 05:03:00 | i assume you mean LNB arm. buggered if i know how one would get blown down by frost ;) but anyway need pic so can get an idea of what dish it is etc. normally if the arm come off you can see where its broken off and simply place the arm back on those marks. alainment is normally resonable critical but you can normal adjust the LNB to suit. i've seen installers put the arms on inside out, upsidedown and backwould and the dish still works ok. |
tweak'e (69) | ||
| 789054 | 2009-07-05 05:15:00 | Thank you for your reply. Yes sorry, LNB. The arm filled with rainwater which froze & split the tube, also altering the angle of the bend. It is a 75cm KU Band Offset Dish Antenna. SK75-PW/G. As I said, I have the Offset Angle & Focal Length, just need to know how/where to apply them. |
Driftwood (5551) | ||
| 789055 | 2009-07-05 05:22:00 | To align the dish for Freeview: forums.overclockers.co.nz www.geekzone.co.nz columbiaisa.googlepages.com Optus D1 (160°E) – Freeview, Sky, TVNZ channels, DW, Nasa TV, CCTV9. Look up the satellite on http://www.lyngsat.com and you can get all the info from there. Better yet, enter your address here: www.satmax.co.nz |
Strommer (42) | ||
| 789056 | 2009-07-05 05:32:00 | The arm holding his LNB is bent Steve_L, so none of that is going to help him. | pine-o-cleen (2955) | ||
| 789057 | 2009-07-05 07:24:00 | ok i get it. the drain hole in the arm blocked up, filled up with water and froze splitting it. provided you didn't cut the tube you should just be able to bend it back. if you have focal legth you should be able to measure that off the surface of the dish in several places, where they intersect is roughly where the pickup inside the LNB should be. if you had a meter you could simply bend back to where ever the signal is the strongest. otherwise just ask around, there is proberly a few damaged dishes around you could get a new arm off. |
tweak'e (69) | ||
| 789058 | 2009-07-05 08:31:00 | There are no spare parts available in this area. So I either buy a new disk or repair this one. I can bend this arm to any position, but what I need to know, bearing in mind this is an offset disc. 1/ Does the angle through the centre of the LNB intersect at the centre of the dish? 2/ Is the focal length, the distance from the white face of the LND to the centre of the disc? 3/ What exactly does the offset angle refer to? Here is a similar dish. www.freetv.co.nz |
Driftwood (5551) | ||
| 789059 | 2009-07-05 09:16:00 | You could carefully remove the LNB & replace it with a sausage, spray the dish with oil, rub aluminium foil onto the inside surface, then, aiming the dish at the sun, put the sausage in the hottest bit and when the smoke curls up you will understand why the sausage is the sacrificial target. Don't get your hands near the focal point, or you will find out why you shouldn't have. Although not as much fun as a sausage, a sheet of paper does not blank out too much sun, and makes it a bit easier to find the focal point. |
R2x1 (4628) | ||
| 789060 | 2009-07-05 09:50:00 | I wouldn't mind seeing the sun. It would be a nice change. We had snow last week & prior to that 3 weeks of sub zero temps. | Driftwood (5551) | ||
| 789061 | 2009-07-05 11:44:00 | Snow and ice are fine on post cards or out plane windows. They should not be released near regular peoples habitats lest the lettuces go a bit weird. ps: I remember sunshine, my memory must be better than I thought. (Or my forgettory is failing.) |
R2x1 (4628) | ||
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