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Dishing it out

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Posted by Glenn on February 14, 2004, 6:49 pm
 
My pet project has finally grown some legs.  The 10' dish is up !
Active in receiving cband TV, now to add the plumbing for the solar hot
water part ...
Read about it (if you're bored :-) ) at http://www.pluggedin.ca/heater.html

Feedback always appreciated.

Glenn


Posted by Duane C. Johnson on February 14, 2004, 9:14 pm
 
Hi Glenn;



That rocks!


FYI, you realize that that C-band LNA will
be fried when the sun lines up with a satellite.

Serious aluminum melting temperatures,
let alone the electronics.


I tried to get one of those dish controllers to
move a dish in a controlled manor. I wasn't successful.
They seem to be reprogrammed for specific satellites.

If you figure it out great.
I have a link to programs that calculate the sun's
position. See Keith Burnett's codeings:
http://www.redrok.com/analemma.htm#burnett


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Posted by Glenn on February 15, 2004, 3:08 am
 The feedhorn took a little more heat than expected this past week :-(.
I expected to have two more weeks until the TVRO solar outage, where the
sun aligns with the clarke belt and causes loss of reception issues as
it passes behind satellites.

The plastic cap on the feedhorn melted and is hanging, the polarotor
which was in good order last weekend does not function.

This weekends efforts center on getting my 4dtv receiver fully setup
such that it can use its timers to look west in the AM and east in the
PM.  Failing that a $00 LNB burns up.

On the upside I've got several satellites programmed into the receiver,
I just wish the polarotor was up so that fine tuning could commence.

The adventure continues ... Glenn


Duane C. Johnson wrote:


Posted by Brian on February 15, 2004, 5:44 pm
 Will you be adding a 2nd motor for tracking elevation?

Have you considered using dual motors being controlled with DiSEqC commands?
A program could be written to issue DiSEqC commands  via twin pci satellite
cards (Twinhan VP1020) and a V-Box II to adjust elevation and azimuth.

As the sun traces the Clark belt, I would imagine that your lnb will be in
harms way for up to eight weeks each year.
-------------------
Brian Gohl
Satellite Audio Video
http://www.adventistsat.com




Posted by Aardvark on February 15, 2004, 6:19 pm
 

Having the feed horn mounted on an arm that would pivot out of the
sunbeam during solar use.
A electric automotive window motor could swing the arm.

Use limit switches(micro swiches)to park the swing arm.
They will work with upto 18 volts DC.

WW




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