Prime Focus Ku alignment issues

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hotsat9
Posts: 18
Joined: Thu Jan 18, 2018 11:11 pm

Prime Focus Ku alignment issues

Post by hotsat9 »

I have a prime focus dish. I have always used "C" band. Today I decided to hook up the Ku side of the lnb and play with it.

At first, I thought perhaps the Ku side of the lnb was not working because I couldn't get signal from any linear polarized transponders. I then pointed at 121w and could receive some of the circular polarized transponders.

I have the LNB peaked for C band. Rotation of LNB, elevation and azimuth.

Im thinking perhaps the Ku part of the lnb may need to be rotated independently of the C side of the LNB.

Anyone here encounter a similar problem? What did you do to fix this issue?

Thanks!

STRETCH
Posts: 3641
Joined: Mon Jan 09, 2017 2:31 pm
Location: West Midlands UK

Re: Prime Focus Ku alignment issues

Post by STRETCH »

For KU band, I would think a universal lnb would be best, then you would be able to receive channels in the low / high bands.
The lnb settings in the receiver would be (9750 -10600).
Also have a look at (dish pointer), this site may be of some help.

Den

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Feralkiwi
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Location: New Zealand

Re: Prime Focus Ku alignment issues

Post by Feralkiwi »

If you are using a Ku / C combined LNB, I find these need the line of the LNB to be very correct to the center of the dish.
You do loose a little of the signal with the combined units.

Check what low frequency the Ku part has.

Owen
Dishes; 3x3m, 2.4m and 4.1m, 10+ ku, 2 movers, USARLS. V8 Combo, Pro, V8 Golden, Nova V8Pro2, GTC, Super.V7HDs, Combo and V7s V7Plus Finder, Finder-Meter V8X / UHD V7Pro GT/XCombo. Sats 100.5E to 177W. I'm a Sat hobbyist who helps out.

digisata33
Posts: 14
Joined: Fri Jun 12, 2020 5:25 am

Re: Prime Focus Ku alignment issues

Post by digisata33 »

Do you have a mesh dish or a solid dish? If it is a mesh dish with too large of holes, it will not pick up ku band very well

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