[MLB-WIRELESS] Dish focal Calculation

[David Smith]

Sounds like it's Offset Feed dish.  In that case, determining the focal 
point is not entirely obvious if you don't have the original LNB and its 
mounting.

This should help: www.qsl.net/n1bwt/chap5.pdf

Regards,
David Smith.


Datec wrote:
> Just an extra point, It’s a dish not a grid as some have given answers 
> in respect to.
> 
>  
> 
> Thanks
> 
> Peter
> 
>  
> 
> -----Original Message-----
> *From:* Datec [mailto:datec01 at optusnet.com.au]
> *Sent:* Sunday, 11 June 2006 7:38 PM
> *To:* 'melbwireless'
> *Subject:* Dish focal Calculation
> 
>  
> 
> Thanks so far guy’s,
> 
>  
> 
> What’s doing my head in is the shape of the old Galaxy dish, its oval 
> and I’m told the curve is part of a larger curve as only a portion of 
> the parabola is used to save space.
> 
>  
> 
> So my problem seems to me, that I don’t have the edges of the complete 
> dish to find the focal point! Or am I just being a complete thicko.
> 
> 
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