[Moon] [Moon-Net] Offset dish question

[kl7uw at acsalaska.net]

> Jan can you send me some of the answers you received please ??
> Thank you
> Serge VE1KG
>   ----- Original Message -----
>   From: Jan Vadilijev
>   To: moon-net ; moon at moonbounce.info
>   Sent: Sunday, April 26, 2015 7:36 PM
>   Subject: Re: [Moon-Net] Offset dish question
>
>
>   Hi there,
>
>
>   I must thanks for all yours helpful answers. I think I understand where the
>   shadow LNB and the focus must be now.
>
>
>   I very like the method with water suggested by John PA7JB and I can really
>   find the spot on the LNB. I can confirm with my tests today.
>    I think you must be careful only that you watching/pointing with dish directly
> to Sun
>   otherway the spot will be on the other place not on the LNB?
>
>
>    If the LNB shadow was on the bottom rim of the dish I can find the "light" on
> the LNB....
>
>
>
>
>   big thanks again to all your answers
>
>
>   Br Jan
>
>
>   On Sat, Apr 25, 2015 at 4:36 PM, Jan Vadilijev <jan.vadilijev at gmail.com> wrote:
>
>     Hi there,
>
>
>
>
>     I have a stupid beginner  question but I couldn't explain myself.
>     If I turn offset dish to Sun where must be the shadow of the LNB?
>     If I'm right the shadow of the LNB is not in the centre of dish like in
>     a prime focus dish?
>
>
>
Serge and all:

Wish most offset feed dishes the feed shadow placed at the bottom of the dish where
the feed support arm comes out will successfully calibrate your dish pointing.  I
have not seen it necessary to see light on the feed itself.

To get an accurate pointing with light on the feed attach two aluminum tape strips
in a cross across the middle of the dish and point at the sun and you should see a
cross image at the feed.  May be easier to see if you hold a plain sheet of paper
right in front of the dish for the "light cross" to be projected.

73, Ed-KL7UW
from Parkersburg, WV (on the road)
>
>     BR Jan
>
>
>
>
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