Thanks to my friend PotroLoco for this I have used it and it works great for prime focus dishes . Here is the attachment
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Focal Point Length Calculator
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Looks simple enough. Does that measurement take you to the plastic cover over the throat of the LNB?
That's nice, pretty much the same as "diameter squared divided by 16 times depth = focal length". Also you may want to give this program a try: Parabola Calculator version 2.0
I may be missing something, but I don't think that there is any way that this can work for offset dishes. This is a calculator for prime focus dishes.
Yes, using the WiFi calculations will allow you to get the off set focal point, and your welcome.
How much does the Freq. affect the focal length? What I mean is, for Ku band you are using a range of frequencies, how do you determine the proper frequency to input into the calculator? Take the center freq?
Edit: I think I answered that myself. I downloaded the Parabola Calculator 2.0 and punched in a few different frequencies and it did not affect the focal point but it did affect the efficiency or more the gain of the dish.
Edit: I think I answered that myself. I downloaded the Parabola Calculator 2.0 and punched in a few different frequencies and it did not affect the focal point but it did affect the efficiency or more the gain of the dish.
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