With some help from Iceberg and others, I've compiled a short list of some common dish sizes.
If anyone sees an error, do let me know:
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[B]Primestar / ChannelMaster dish info[/B]:
84e is 40x30
75e is 37x27 arm: 21"
70e ?? 35x21 Hughes
60e is 32x20
[B]DishNetwork Superdish and DirecTV dishes[/B]:
DishNet SuperDish: 36" x 20"
DirecTV Slimline: 32.5 x 22.5
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One source of replacement LNBs is ImpaktProducts.com
There are at least three of the soup-can units, with various brands, markings, and features.
Be sure you understand which you want.
Also, they may show the feedhorn in the picture, but they don't ship with it (unless specifically noted).
The name they use for the feed is something like:
LNB mounting bracket. -
If you search elsewhere, such as eBay, look for: Hughes, Primestar, or Eagle Aspen
(and if you are unsure, post here and someone can confirm you've found the right one)