I've read about the new two satellite EA LNB. Would it be possible to use that LNB with a FTA dish or even the SuperDish to get more surface area reflection and thus greater signal strength to eliminate rain and snow fade and to simplify the connections eliminating the DPP+ Switch? I've read through the forum and done searches and cant find this answer...
EA LNB with FTA dish?
- Thread starter thegrod
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Sure you can use it all you need to do is find the focal point for the satellites on the FTA dish you want to use.
not worth the time or effort with the stock EA LNB. The LNB on a EA dish is set up for a EA dish focal point. If you try another dish it wont work as the focal point will be different and also the spacing is different the larger the dish is. You can use 2 separate LNB's and rig up something
the only good reason to use one is if you are on the fringe of a spotbeam. I am in Minneapolis and wanted Duluth locals. Spotbeam on a D1000.2 was in the low 40's but on a 36" dish was in the 70's
It is more helpful with Ku than it is with Ka. That being said, Ku is absolutely subject to the vagaries of atmospheric absorption but the loss typically runs at 10-35% that of Ka.
With the change in sat at 61.5 recently and the spotbeams being contoured differently a large dish will help if you are in the edge of spotbeam. I recently moved my "move" from DFW to Austin. I gained 35 on SS/SQ by doing so. Yes there is some help in rain fade, but haven't had any since I switched so can't say how much help it is. I'm using a meter dish (really only .9m) for my signal.
Dish doesn't use Ka. Only D uses it. But I don't understand why an increase in dish size wouldn't make a difference. I've worked w/ sat for years all the way to C band days. Physics doesn't seem to agree w/ that statement. Should bear true that a double in size of dish will should quadruple the gain. At least that's what I seem to remember about RF frequency signal gathering. Ka should work the same since it's an RF signal.
IIRC, the explanation was that the signal is scattered by rain long before it gets near the dish.
There is a limit to how large a dish would be effective.
If the iris of the lnb is limited around the edge, the lnb cannot see the new reflective material, the lnb has limited peripheral vision.
If the iris of the lnb is limited around the edge, the lnb cannot see the new reflective material, the lnb has limited peripheral vision.
You will have to post a link to an article on that. I've never ever heard that. Then is a point of diminishing returns though.
That would only be in a downpour. In which case the cloud also has an effect. It's not really a scattering, but mostly an absorption or blocking that effects the signal.
The feed horn would be located much further away from the dish so the angle of incidence at the edges (assuming a single focus dish) would remain pretty much the same.
