Quote:
Originally Posted by boz
A T-90 is a great dish. I've got one. Problem is that you have to chunk the old dish, which wasn't exactly what he was looking to do. Plus the T-90 is a monster. It's huge, and doesn't exactly fit low-profile apartment mounting requirements.
Anyway, I figured with a few cable clamps, some tubing and a couple circularl LNBs, he should be able to get the 110 and 119 birds. And he doesn't need to shell out $200+ for the T-90.
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It might work, however bear in mind that there is only one focal point of a sat dish, so any time you put a second or third lnbf on a dish, it will not be an ideal situation, as you will be basically hunting for places where parts of the dish are focusing and other parts of the dish are not. I think most people think that sats to the east or west of the sat the dish is aimed at will just focus at a different point left or right of the prime focus of the dish, but this is just not the case. If you search back for my posts about an experiment where I put little mirrors at different parts of a dish, and then aimed at the sun, the results really show that when you move off center, that different parts of the dish aren't anywhere close to be focusing at a single point. The five little spots of reflected sunlight were zipping around in all directions as I slowly turned the dish off axis.
And the further angle wise you get off center, the worse it will be. However the thing that makes it more possible is that the Dishnet sats are very powerful, so you are more likely to find a spot for the lnbf that will give enough signal to lock.
On the other hand, it is my understanding that the T-90 thing, which I have no experience with, is designed with the idea of bringing the out of focus off center reflections back into focus. I don't know if it's perfect or not, but at least they are attempting to make off center focusing possible. There are a few people here who seem to have had good success with the T-90, but few people have good things to say about just strapping an additional lnbf on a regular dish. I've done this myself on my 10' dish, ie put a
DTV lnbf on the side of the regular feed, and it worked, however I got better reception out of a separate 18" DTV dish.
I'm not saying not to try, as I would probably try such a thing myself in that situation, but I think it's clearly something that should be viewed as an experiment that might work and might not.