Prime Focus Dual KU LNBF???

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iBoston

iBoston

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Do they make a Dual output Prime Focus KU LNBF? I have been trying to find one, but not having much luck
 
iBoston

iBoston

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Do you get noticeable performance difference between something like this and an cheap KU lnbf?
 
primestar31

primestar31

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Do you get noticeable performance difference between something like this and an cheap KU lnbf?

Yes, IF you are comparing between a prime focus lnb used on a prime focus dish, OR an offset lnb (built for an offset dish) used on a prime focus dish.

The offset lnbf has the feedhorn built in, and it's set for offset dishes much higher F/D, so there's a loss due to that. When using a prime focus dish (especially a mesh one) for KU reception, you need to peak it for every bit of gain you can possibly wring out of it. In my experience, a 10ft dish IF peaked perfectly, can at most ONLY equal the reception on ku of a good 1.2m offset ku dish.

In other words, if you can, it's almost always better to use a dedicated 1.2m KU dish for KU, and a prime focus dish for C-band.
 
iBoston

iBoston

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Yea, i have an offset LNBF on my Cband 10' mesh. Trying to figure out what root to go.. Have you seen that device available in the US or canada?
 
N6BY

N6BY

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The Gibertini is for offset dishes with an F/D of 0.6 and 0.7.

Do you get noticeable performance difference between something like this and an cheap KU lnbf?
I have an Invacom SNF-031 LNB on my 8.5' Birdview solid. KU performance is disappointing -- not much better than my smaller offset dish with a cheap KU LNBF. Its possible that there is something wrong with my Birdview setup. I'm considering replacing the Invacom with an Inverto LNB.
 
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N6BY

N6BY

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WHOOPS, I missed that, as I just focused on the C120 flange! Thanks for the correction!
The only reason I knew is because I looked it up on eBay about a week ago.

Also, I just saw your earlier post about 1.2m vs prime focus BUD for KU and we agree that there is no big advantage for a BUD on KU band.
 
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