Anyone tried to make BIG dish at home?

What about using like 3 dishes and connect the lnbs to the same wire
Instead of making pipes
Or even connect them with disec
Sorry if it seems stupid idea
 
If it was as easy as that then we'd all be doing it. You'd need to combine the signals in such a way that the timing of the signal from each dish was perfectly identical, and that is way beyond the abilities of us hobbyists :)
 
What about using 2 large offset feed dishes
And using the georgian or cassegrian design to project it to LNB


Would that allows us to receive out of horizon satellite

Something like that
 

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No, same reasons as post #542. What does "out of horizon" mean?
 
ozumo said:
No, same reasons as post #542. What does "out of horizon" mean?
Click to expand...
But it isn't the same sir?

I will using 2 satellite dishes to project to Single LNB at the same time? Out of horizon mean out of reception area or out of foot print
 
midozalouk said:
But it isn't the same sir?

I will using 2 satellite dishes to project to Single LNB at the same time?
Click to expand...
It is the same reaason -distance signal travels from reflecting surfaces (dishes) would have to be identical to the micron or signals would be out of phase (and time lagged)
 
midozalouk said:
But it isn't the same sir?

I will using 2 satellite dishes to project to Single LNB at the same time? Out of horizon mean out of reception area or out of foot print
Click to expand...

It is the same, the timing of the two signals when they reach the LNB will be ever so slightly different. It doesn't matter if the signals are being joined at the LNB or in a cable, if they aren't perfectly in sync there won't be any benefit, if anything there will be losses as the signals cancel each other out. Feel free to create such a set up, I'd love to be proved wrong.
 
Timing/distancing ("in phase") is one thing, another thing (I think even more important) is the feedhorn I guess.
A feedhorn expects an 'equal' field of signal, so to say, preferably with the highest density in the center.
So if you create more parabolic surface (by combining several offset dishes), but with holes in it; then from the holes you receive noise. (Unless you have a feedhorn with a shape, that matches the exact illumination by the parabolas.)
Adding a secondary mirror (cassegrain or gregorian) doesn't alter that.

So the effect is that you get more signal, AND more noise. So the S/N ratio result will likely be about the same as with just one offset dish, or maybe even worse.

When you want a bigger dish surface: Buy/make a bigger dish! All other solutions are troublesome, or maybe even worse....

Greetz,
A33
 
midozalouk said:
What about using like 3 dishes and connect the lnbs to the same wire
Instead of making pipes
Or even connect them with disec
Sorry if it seems stupid idea
Click to expand...


One of our forum members has a clover - 4 leaf - design dish, they use the image as their avatar.
 
Channel Hopper said:
One of our forum members has a clover - 4 leaf - design dish, they use the image as their avatar.
Click to expand...
You forgot to mention that it gave no better results than one dish.
 
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