C band Lnb & Scalar ring question

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James leandre

SatelliteGuys Family
Jul 25, 2007
26.4 N, 81.4 W
How is everyone doing today?
I'm new to C band discussion, but I've installed a motorized ku dish.
my question is, does someone necessarily need a scalar ring on a
C band Lnb, to get good quality and when adjusting Lnb skew, does the Lnb have to be as far back from the holder as possible or pushed in toward the dish. I'm thing about setting up a mini-bud.

Lone Cloud

SatelliteGuys Pro
May 23, 2008
I heard once what the purpose of the scalar plate was. I don't remember now, but it has a purpose that is relevant to c-band.

I have never tried it without the scalar and I am on my second BUD. That said, it should not be a problem, since a lot of lnb...s come with a scalar.

As far as in or out (focal length) and twisting it in the scalar (skew) , those are adjustments you make to maximize your signal . You keep fiddling with it until you get it . Either that or you get a satellite meter.


SatelliteGuys Pro
Jun 24, 2006
5 miles N of Saugatuck, Mi
When you use a Ku dish with a C-band lnbf you are grafting an apple onto an orange tree. Expect that it will not be an optimized solution. With a Ku dish, you need a conical scalar ring for best results, although the flat scalar, located correctly, can improve the quality of the signal.
My advice is to optimize the signal on your lnbf before adding the scalar ring. Then add the scalar and move it to the best point slowly and methodically.


SatelliteGuys Pro
Sep 17, 2004
Charleston wv
the scalar ring on a c band dish blinds the feedhorn from sidelobe interference and noise. Its always best to use a scalar ring on a prime focus antenna
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