Quote:
Originally Posted by javrua1
Hey I'm also in Puerto Rico and wanted to improve signal strenght so I bought the Fortec 6 ft dish. I had no idea of the offset vs circular issue. 
Any new info on how to get a dishnetwork satellite such as 61.5 (hd channels) with this Fortec dish? Any news on a special LNB to do this?
Thanks.
ps: if not does anybody want to buy a new Fortec Star 6 ft dish? ill sell it for under a hundred bucks! |
I'll pay $150 if you pay the postage.
But to the above, I don't think that there is any "offset vs circular issue". I think the main issue is that most lnbs made for
DTV and DishNet disher are designed for dishes that have a high F/D ratio, ie a long focal length compared to size of the dish. THe small DBS dishes have F/D ratios around 0.6 while most big
C-band dishes have F/D ratios in the 0.25 to 0.35 range. This means that the DBS lnbfs are attempting to look at a smaller angle, and may not see the outside edges of a dish with a low F/D. If the big dish is a high quality dish, as long as you have the lnbf at the focal point, you'll always be better off with a bigger dish, regardless of what lnbf you are using. One thing though, if you try using one of those multi-sat lnbfs, they will not work, because the spacing will be wrong, but if used for a single satellite, there should be no problem. It would be better if you could find an lnbf designed for low F/D ratio dishes, but I would bet that even the regular lnbf should work OK if the dish is a quality dish. I agree though that if off center, and with a low quality dish, you're better off with a small dish. I put a DTV lnbf 8" or so off center on a warped and dented 10' dish, and the results were worse than with an 18" dish, but I'm convinced that if I had put the lnbf at the center rather than sharing the space with my C-band feed, and if my dish wasn't in such bad shape, I would have done much better. I don't know anything about the quality of the Fortec dish.