[MLB-WIRELESS] Dish focal Calculation

[Datec]

Thanks David, I think that is what I need.
Now I just have to work it all out, once I've finished I'll make up a
template in case anyone else needs to find the focal point on one of these.

Peter


-----Original Message-----
From: melbwireless-bounces at wireless.org.au
[mailto:melbwireless-bounces at wireless.org.au]On Behalf Of David Smith
Sent: Sunday, 11 June 2006 10:38 PM
To: 'melbwireless'
Subject: Re: [MLB-WIRELESS] Dish focal Calculation

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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>
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> Melbwireless at wireless.org.au
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