N78 Antenna

[clanon 334]

A disc without CUTS or SLOTS is Linearly Polarized...tho

[papagayor 22]

Please explain me, does this affect performance? Should I make the "cuts" on 2nd disk at about 5mm???

[papagayor 22]

Testing on CST looked like there is not much difference........

In any case thank you for watching, if you can suggest something it's welcome, in any case I upload the CST file for make things easier.

FINAL-BESTER-7-5-4-3-HEX.cst

[clanon 334]

1 hour ago, papagayor said:

Please explain me, does this affect performance? Should I make the "cuts" on 2nd disk at about 5mm???

depends on the PROVIDER Polarization if it's linear Vertical Horizontal at 90 degrees is ok...(if Circular you lose several DB) ussually is slanted -45 +45 (90) so rotating the feeder slightly you should get a little more or less gain

Edited February 21 by clanon

[papagayor 22]

Oufffff, using Cosmote in Greece, it has "linear vertical" polarization. And you see the problem is not the construction correction, the problem is .....re-mounting it!!! Very helpful your suggestion, I learned something more, thank you.

[Admin 2869]

Try to bring them onto the same axis of symmetry...

[clanon 334]

15 hours ago, Admin said:

Try to bring them onto the same axis of symmetry...

ALSO https://i.postimg.cc/pVs5WGZ3/IMG-20260221-142416012-HDR.jpg

https://postimg.cc/z3RGpk4k

 

You should get at least 2 or 3 db more if done correctly also S/N ratio gets better and quality of link (packets lost get lower)

Edited February 22 by clanon

[papagayor 22]

You're right. Have to find a solution for this, the problem is that the LMR's are to thick and difficult to turn them, also they don't leave much space behind, I'll find a way to correct this. But I don't understand the "red lines" to "green line" alignment???????

Edited February 23 by papagayor

[clanon 334]

18 hours ago, papagayor said:

You're right. Have to find a solution for this, the problem is that the LMR's are to thick and difficult to turn them, also they don't leave much space behind, I'll find a way to correct this. But I don't understand the "red lines" to "green line" alignment???????

ONE of the TWO RED lines in the picture should be the same that the DISH to LNB support (one of those TWO red Lines should be ALIGNED with the dish LONG side height---