A couple corrections...Any credit due for that info goes to Mr. primestar31, I just liked his post.Wow! I think that phlatwound has answered your question.
I'm far from being an expert like him, but I can tell you that it's an 8-foot dish I got from the roof of a motel near my place, so it was beforehand perfectly fitted.
I swapped out the LNB for one of this type.
BSC621 C/Ku Standard LNBF - one LNB for both C and KU bands
BSC621 C/Ku Standard LNBF - one LNB for both C and KU bands LNB, LNBFwww.satellitebg.com
Also, if it can help, it is located approximately 1 inch from its tip and 33 inches from the base of the antenna.
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And...I'm not to be mistaken for an expert