[creativegenius]

Hey wgknappy:

Ahhhhh it good to see a bit of humor in these forums from time to time, everyone is usually so serious <grin>. Not today I see!

The old Hughes dishes are great, there are nice and big ... so you can easily mount 5 LNB's or so on there - no problem.

What you'll want to do is determine the focal length, which in turn will help you determine the length that the arm has to be given the LNB's you'll be using.

1) f/ D ratio (precise distance or focal length from centre of dish)

2) Offset of the LNB (degree of rotation),


Setting No 1 (The focal length)

The focal length is the distance from the deepest point in the center of the dish to
the front of the feedhorn on the LNB.

For technical specialists:
Refer to the instructions for your dish to obtain the correcfocal length.
If you do not instructions, you may need to rely on the formula below:

Where D = diameter of dish, d=depth of dish (measured in the center from the face to deepest point).

Use a piece of string drawn tightly across the center of the face from one rim to the opposite rim to get an accurate face position.

The focal length is = f
The formula is: f = D x D / 16 x d.
Example: D = 2.3m and d = 0.375m. f = 2.3 x 2.3 / 16 x 0.375= 5.29/6 = 0.882m

Creative Genius