Dish illumination

[koansrc]

another silly question folks I'm afraid.

You know when we say "the feedhorn illuminates the dish" or vise versa ... well as I was fiddling with lnb in the dark with a torch I thought wouldn't it be great to be able to actually see how much of the dish is getting "illuminated" by the lnb !!

So in order to actually physically see this "illumination", would there be any point in attempting to actually shine light thru the feed and onto the dish ? Would be great fun to adjust the feed that way and then re-attach the lnb.

[ If this isn't a siily idea, then it's already copyrighted and patented ;) ]

 

[Robbo]

another silly question folks I'm afraid.

You know when we say "the feedhorn illuminates the dish" or vise versa ... well as I was fiddling with lnb in the dark with a torch I thought wouldn't it be great to be able to actually see how much of the dish is getting "illuminated" by the lnb !!

So in order to actually physically see this "illumination", would there be any point in attempting to actually shine light thru the feed and onto the dish ? Would be great fun to adjust the feed that way and then re-attach the lnb.

[ If this isn't a siily idea, then it's already copyrighted and patented ;) ]

I think its a silly idea

because light is not going to behave the same way as microwaves do inside the feedhorn. Light needs something that is reflective to it, like a mirror or something shiny. The feedhorn on the other hand could be a matt surface and still work.

Although the idea is not totally stupid, as I have read in another post somewhere that lasers can be used to reflect off the dish surface ok, to check assembly of a petalised dish.

 

[koansrc]

ehm, funny thing is, this idea has got me thinking ... silly me ...
and I think that any light source coming thru the feed and onto the dish, will produce a circle of light on the dish. Could I use this circle of light to "center" the feedhorn and aim it ?

Another reason I like this idea is that it gives me an excuse to work on the dish at night too ...

 

[2cvbloke]

How about hot-gluing 8 LEDs around the LNB? I dunno what it'd do technically, but it'd make your dish look cool...

 

[Robbo]

You could also cover your dish with aluminium foil, point it at the sun, strap some sausages to the feedhorn and have youself a free barby.
and if you used red leds, it would look all the more inviting.

 

[2cvbloke]

You could also cover your dish with aluminium foil, point it at the sun, strap some sausages to the feedhorn and have youself a free barby.
and if you used red leds, it would look all the more inviting.

Mirrorball mirrors are better than tinfoil, don't you watch Mythbusters???

 

[Robbo]

Mirrorball mirrors are better than tinfoil, don't you watch Mythbusters???

No, but your'e right of course.

Also use multicoloured flashing LEDs and you could have yourself a Disco.

 

[2cvbloke]

No, but your'e right of course.

Also use multicoloured flashing LEDs and you could have yourself a Disco.

Very true, or a very unique Christmas decoration...

 

[aba]

sound like the old cb days if some one was useing power use to get i fluaresant tube and strap it to the side of there aerial ever time they went to transmit the fluaresant tube would start to glow should have seen them at night

 

[2cvbloke]

sound like the old cb days if some one was useing power use to get i fluaresant tube and strap it to the side of there aerial ever time they went to transmit the fluaresant tube would start to glow should have seen them at night

I remember getting a zap from my old CB magmount aerial, I didn't mean to touch the aerial, I just brushed it whilst nattering and, erm, yes, I sent an expletive over the airwaves!!!!

 

[CROSSBONES]

This may help you out Koansrc.

-http://gjullien.fr/mirrors/mirrors.htm


Any one for some steak?

-http://backya2.fatcow.com/j/solardsh.htm

 

[tesla]

I can't understand the purpose of this thread.

@koansrc re partida, gia kane to pio liana.

 

[2cvbloke]

I can't understand the purpose of this thread.

@koansrc re partida, gia kane to pio liana.

I think I kind of sent it off topic with the LED thing, so it doesn't make much sense now...

 

[Topper]

In that case I will consign it to the archives by closing the thread if you wish

 

[koansrc]

I musta hit a funny bone with everyone ....

 

[koansrc]

I can't understand the purpose of this thread.

@koansrc re partida, gia kane to pio liana.

partida i patrida to idio einai ...

I was discussing another hi-tech, scientific way to check if the feedhorn is aimed at the center of the dish .... and then all humour broke loose !


I think it's off to the archives with this one ...

 

[tesla]

i suggest something else. Remove the off topic posts and let the thread continue.

@koansrc: you are right, i should write patrida. It was a little bit late when i wrote the post.

 

[CROSSBONES]

This may help you out Koansrc.

-http://gjullien.fr/mirrors/mirrors.htm

Whats off topic about that?

 

[dig deep]

I vote for the 8 leds

It is soon X-mas so use red ones

 

[mhku]

koansrc and tesla:

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