LNB's aiming point

[battenfan]

View attachment 61982
With a openings angle of 60º of the BU (I dont know the real angle of that lnb) its in original position of the lnb , looking also to the lowest edge but there is a lot of overspil at the top .
Maybe its that the way the Triax should work .

I am speculating here but angles aren't that sharp as the signal fades at the edges and as the top is furtherest from the lnb, maybe Triax decided that the edge taper at the top isn't worth spending the extra dish material.

 http://www.qsl.net/n1bwt/chap4.pdf

 

[battenfan]

Does anybody have a quick suggestion on what to buy? I am overwhelmed by the vast of emitters, lenses and stuff that are available at the Chinese web store.

 

[RimaNTSS]

I've ordered this Boresighter, waiting delivery. Should be OK tool.

 

[battenfan]

In a 40 mm plastic drain pipe, I mounted dx's 196216 , a green laser pointer with a gypsophila filter. I hoped some moist on the dish face and fog in the air would make it possible to see how much the rays are diverging but it seems I need some reflective material on the dish. It's funny as I move the feedarm up and down, the dots at the bottom of the dish stays roughly the same, the center dot moves just a tiny bit and the top ones moves a lot. I also have some red, both dot and line, laser modules to play with but the cheapest ones have bad focus. Green is very visible even in daylight.

View attachment 68609
Brainstorming: Next project will be a diy 3D scanner and let the computer figure out where the lnb should be and where it should be pointing.