Oblong vs. round dish.

[123tim]

I'm looking into buying a Fortec 90cm dish and realized that it's actually 85cm x 94 cm. Are there any advantages or disadvantages to having an oblong dish? Would the gain be the same gain as a 90cm round dish?

Thank you.

 

[PSB]

Most dish seem to be slightly oval, I am sure if it were a big deal they would make them all exactly round.....

 

[Mr Tony]

now if it was really oblong (like a 40x30), that is used for multiple LNB's (bigger focal point)

 

[bidaw]

Mine is slightly oval as well, and as Iceberg mentioned...great for multiple lnb's. I can testify to that!

 

[Shawn95GT]

I read a good write up about offset dishes while trying to understand how feedhorns work. The whole writeup is here:

http://www.qsl.net/n1bwt/chap5.pdf

Atached is a figure from that PDF that explains it pretty nice .

Shawn

 

[baya]

now if it was really oblong (like a 40x30), that is used for multiple LNB's (bigger focal point)

Iceberg, so I can rig my old Primestar disk with a Universal KU and a Cband LNBF and a HH100. Is that posible?

 

[Zozon]

I got Fortec 90 cm dish about a 3 weeks ago. It works great. It is as you said 85cm x 94 cm but longer side oriented vertically like an egg. Shouldn’t the longer axes be oriented horizontally for multiple LNBs?
Zozon