Mesh straightening

[armadillo_115]

Got a couple of question about the mesh on my 10 footer.It will be used for both KU and C band.I'm sure it's already fine for C band because it's in better condition than the 7.5 footer that I'm using now.
1) How critical is it to remove all the small waves for KU reception? My mesh is pretty tight but it is slightly
wavy.Mostly ripples that can only be viewed from an angle.I'll hammer and dolly out the dings.
2) Should the mesh be flat or cupped to match the curvature of the parabolic? How was it shaped when new?

That's not counting one panel that has a 6 inch tear to stitch up and the hammer ding I put in it during the removal procedure.I will remove that one panel and roll it out.
Thanks folks!

 

[FaT Air]

i'm one that prefers not to do Ku on a BUD. (UNLESS, you have a commercial BUD that's rated for Ku, That is) Tracking is Critical as the beamwidth is a fraction of 1°. The accuracy of the parabola is Critical, in all planes. (So yeah the curvature is both dimensions. not flat across the ribs) Seams that all I've read is the performance, at best, is comparable to a 90cm in most highly tuned systems. Only slightly better in only a very few.
But for convenience of operation it has it's advantages. But for performance of operation a separate motorized 1.2m would be the way to go IMHO.
I motorized a .7m with the BUD and didn't miss much. Reason, the mesh on the dish isn't Ku friendly, holes too big. Recently replaced with a 90cm..
http://www.satelliteguys.us/xen/threads/how-i-made-a-c-only-bud-work-on-ku.241465/
http://www.satelliteguys.us/xen/attachments/groupshot1-30-16-jpg.113579/

 

[armadillo_115]

Ok...alternate plan:
I'm after the ACC basketball feeds.I was hoping they would be on C band but all I have heard of are on KU.So I want something working like yesterday.UVA Cav and Duke fan here!

A neighbor gave me a PrimeStar .90 x .63 dish...but it has no mounting bracket or anything on back of the reflector.I can rig something up temporarily to hit 105W.
The question is whether the .90 x .63 dish is large enough to get me those feeds?

I'm going into round ball withdrawal symptoms here.

 

[Titanium]

That dish gain is equal to a 75-80cm and has good side lobe attenuation. Best to use the factory feedhorn to properly illuminate the reflector, rather than use a LNBF that may see past the dish surface and introduce terrestrial noise.

The reflector size depends on the satellite footprint, signal strength, adjacent satellite interference, modulation, FEC, etc. Can't really generalize if the dish will be adequate or not.

 

[FaT Air]

Assuming you have, and use, the feed that matches the dish Titanium is correct _ gain will be comparable to that of a 'normal' 75-80cm dish with the adjacent satellite rejection comparable to a 90cm.
A 'normal' consumer LNBF will only illuminate the central portion of the dish and then the performance, in both respects, would be that of a 63cm dish.

I don't have that size of dish in my Primestar info.
Is there a mold number on the back side - top?

 

[armadillo_115]

It looks like .90 x .63 is the mold number.(35.5" x 26" by tape measure ) Not the largest Pstar dish...unfortunately.