Set up LNB,S for 13e/16e/19e

dave branson

I want to receive Digialb on the same dish,using 3 LNB,s.
The problem is that the LNB for 16e,will not fit between the ones for
13e and 19e.(any pics available or info on how to do would be great).
At the moment I have a monoblock LNB for 13e and 19e,and have been trying to add another LNB,Rolfw advised that installing a Disqu 2x1 in line would enable me to use the monoblock(with internal Disqu) and the extra LNB for 16e,as much as I have tried,it dont work.
Any advice on this subject would also be much appreciated.

rolfw

It is near impossibly to get those three birds on a standard dish Dave, 3 degree gap is too close for standard LNBs. People have done it using Alps bullet LNBs, but even then it is difficult. See this thread.

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Lancelot

You could get a 3 degree monoblock instead of the 6 degree you have, then fit one of the alps type thin LNB's on the end for 13 or 19 depending on which way you've set up your monoblock.


Rgds


L.


SNAP !!!

Attached Images

Alps.jpg (8.2 KB, 9 views)

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I've got an inferiority complex, but it's not a very good one.

Robbo

Another option-

_http://www.satellitesuperstore.com/multisat.htm
scroll down the page to

Advice - Using all four LNBs ( 2/3s way down).

where the sides of the lnbs are shaved off a bit!

dave branson

Maybe its better to set up another dish/lnb dedicated to 16e.
Any info where I can find the size for Italy and elevation angle.
Much appreciate your help.

Lancelot

The footprint suggests that an 80cm should be plenty where you are Dave.
50dBW would be 60-70cm for normal conditions



L.

Attached Images

ew2_wide.gif (32.3 KB, 14 views)

__________________
I've got an inferiority complex, but it's not a very good one.

Robbo

For pointing angle-
_http://www.satsig.net/maps/lat-long-finder.htm

elevation 39.3 deg, azimuth 172.3.

dave branson

Thank you all your help.will post results if i can get it working.

dave branson

Still trying to set the dish up,couple of things,If I set the dish and the
lnb to 16e,when adding the lnbs for 13e and 19e,would it be a problem
if these two lnd,s where slightly higher on the bracket at the arm end,
but pointing at the same point on the dish as the centre lnb for 16e,obviously at the 13 and 19 angles.

Lancelot

Yes it would Dave, as this would be like moving the dish downwards effectively for the two outside LNB's and so you would lose some if not all the signal depending on how far out they were from the true focal point of the dish.



L.

__________________
I've got an inferiority complex, but it's not a very good one.

dave branson

Finally got it all working,I bought a Triax 88 dish with a four 4 lnb multifeeder.
I modified the multifeed bracket slightly to bring the holder of the 16e
designated lnb(Alps) on dead centre,current reading for 16e is 50% level,54% quality 13e and 19e are reading 80/70.
I have a 4 disqu(Spaun) as was wondering where to place a 4th lnb,say for 23/28 east,on the left or right of the bracket facing the dish?