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Old 16-04-2008, 16:25
sherbey
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After a bit of advice; a friend has a flat where he's not allowed to fit an external dish, and its not wired for a group one. I've seen posts here where people have pointed a dish through a window and got a signal; presumably the glass attenuates the signal so I guess he'd need a slightly bigger dish than normal. Any thoughts on dish size? Will double glazing kill it? Presumably solaglass wouldn't be a good idea either....
(the window faces roughly the right way BTW)
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Old 16-04-2008, 16:27
_the_don
 
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After a bit of advice; a friend has a flat where he's not allowed to fit an external dish, and its not wired for a group one. I've seen posts here where people have pointed a dish through a window and got a signal; presumably the glass attenuates the signal so I guess he'd need a slightly bigger dish than normal. Any thoughts on dish size? Will double glazing kill it? Presumably solaglass wouldn't be a good idea either....
(the window faces roughly the right way BTW)
I tried this last year as an experiment, Using an 80cm Triax I got about 20-30 channels of Astra 1, all bad breakup and not watchable, Lead in the Glass blocks signal.
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Old 16-04-2008, 18:57
Bspks
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I'v tried my Technisat 45 cm dish I normally use in my caravan through my doubleglazed bedroom window on the Astra 2 / Eurobird cluster and it works fine.
Signal quality is about 75% although strength is only about 20%.
It has to be quite low down and back from the window or the top of the window frame attenuates the signal.
The window faces nearly straight out to 28 degrees East though and I'm pretty sure that rain on the glass would soon render the signal unusable.
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Old 17-04-2008, 08:46
Sam Radford.
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It depends on the glass type and total thickness, and on the incident angle of the incoming transmission. For best results the glass should be thin (or plastic) and should face the desired satellite. Attenuation will be at least 50% so the dish needs to have at least twice the normal area. (That's area, not diameter.)
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Old 18-04-2008, 00:01
johnwilliam
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After a bit of advice; a friend has a flat where he's not allowed to fit an external dish, and its not wired for a group one. I've seen posts here where people have pointed a dish through a window and got a signal; presumably the glass attenuates the signal so I guess he'd need a slightly bigger dish than normal. Any thoughts on dish size? Will double glazing kill it? Presumably solaglass wouldn't be a good idea either....
(the window faces roughly the right way BTW)


yes it works, i have used an 88cm dish behind double glazing for astra 1 and the hotbird with a 6ft stand for a few years now, at the moment i have it on turk 42e, i can get about 30 odd channels on that one, mind the signal on some of them can break up during the day, the channels on the west beam are the easy ones, 5w is another easy one with 8w as well
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Old 24-04-2008, 14:11
sherbey
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Cheers for the replies.
Trying to find out what window glass actually is is not a trivial task, though I don't think that there is much lead in it tbh unless someone wanted cut glass sparkly windows.
Pilkington K has some sort of coating that they don't specify but I'd assume makes Ku band transmission pretty poor.
I'll try to scrump a lidl portable set off a friend I think. It may work, based on what you've all said; in any event it'll determine if its feasible or not. I'll post back when I've tried it

He's getting double glazing in a couple of weeks too, may be worth a second check after its fitted
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Old 07-06-2008, 20:33
sherbey
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Finally got round to scrumping my uncle's lidl portable dish. Results are disappointing; although the windows face south, they're actually south west-ish, probs about 20 degrees west of south; this means that astra 2 cluster at 28 degrees east of south are at roughly 45 degrees to the window aperture.
With the window fully open, my HDCI-2000 got 70% signal with a watchable picture mostly, dropping to 40% with no picture with the window closed. The trouble is that I can unmount the lnb and still get 40%

So basically it didn't work through glass at all. Absorption was at least 50%, possibly a lot more.
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Old 10-06-2008, 17:36
graham001
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Finally got round to scrumping my uncle's lidl portable dish. Results are disappointing; although the windows face south, they're actually south west-ish, probs about 20 degrees west of south; this means that astra 2 cluster at 28 degrees east of south are at roughly 45 degrees to the window aperture.
With the window fully open, my HDCI-2000 got 70% signal with a watchable picture mostly, dropping to 40% with no picture with the window closed. The trouble is that I can unmount the lnb and still get 40%

So basically it didn't work through glass at all. Absorption was at least 50%, possibly a lot more.
Maybe that says more about the Lidl dish than the window.

I did it for years with a channel master 60cm dish, worked perfectly 99% of the time and it was looking through a double glazed window at about 45deg too.
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Old 10-06-2008, 19:11
eureka
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It depends on the glass type and total thickness, and on the incident angle of the incoming transmission. For best results the glass should be thin (or plastic) and should face the desired satellite. Attenuation will be at least 50% so the dish needs to have at least twice the normal area. (That's area, not diameter.)
I think that attenuation figure of "at least over 50%" is a little "overstated" Just keep your windows clean!
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Old 10-06-2008, 22:17
Winston_1
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The glass in modern double glazing stops satellite signals stone dead. It's to do with some newish rules about heat loss/insulation and the glass is slightly tinted. Early double glazing is OK. I believe the change occured around 6 to 7 years ago.
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Old 11-06-2008, 09:27
mbsnr
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The glass in modern double glazing stops satellite signals stone dead.
Yeap. My Adli special 39cm dish works fine through the father in laws patio windows (cira 1990's) but not through the windows in my house (2005).
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Old 12-06-2008, 15:29
StoppingService
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Hi

How about working-around the problem of Green-label glass, by having a glazier replace it with old-skool glass? Is such glass still made?

Doesn't apply to flats, but for those with use of a loft, how about changing some rooftiles to translucent plastic substitutes and having a dish "see" through those?

Note that dishes don't necessarily have to be attached to your living-quarters; e.g. they can be on a post in a garden.

Have the Greenhouse-Delusionists been able to obtain changes to planning permission which blocks the first two ideas?

Regards
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Old 13-06-2008, 14:00
tr_ramsgate
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Your friend could always open the window and then fit a clip-on sheet of clear plastic over the opening to keep out the wind and rain.

The attenuation through a perspex sheet is minimal.

If he has to get the signal through glass, the best results will be achieved if the signal beam is at 90 degrees to the glass. The incident angle makes quite a difference (according to my experience).
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Old 14-06-2008, 14:28
Adrian Mole
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www.self-sat.com and and Easymount: http://www.satshop.ch/images/003.jpg
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