Newbie Here Dish size for Astra 28.2E, Astra 19.2E and Hotbird 13.0E

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Archive4

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Hi all :)

I just received a dish (Gibertini - delivered from germany) but it looks like it's been damaged a bit - it's got a dent. Have a look:

Front:
View attachment 76427 View attachment 76428
Back:
View attachment 76429 View attachment 76430

It looks a bit worse on the picture than in reality, but is this going to be a problem? Can I repair it somehow whitout sending it back to germany?

Thanks
If you can send it back and get a replacement " FOC " that is the best option. If not, you could try using a hard plastic mini roller, the sort they use for the edges on heavy duty wallpapers, to take the " pimple " out. Will depend on exact location of damage and lnb dwell angle as to how much it will effect the signal.
 
timo_w2s

timo_w2s

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I've managed to push the dent back a bit. Still looks a bit unnormal though, but not a visible as before.

View attachment 76434

However from your "story" post, timo, I noticed you couldnt see a significant difference between damaged and new, so maybe I should't worry too much?? It's a 1m dish. What do you think? (By the way, timo - nice balcony set up :) )

Anyway, I sent an email to the seller in germany. I'll see what he says.
Thanks. Hopefully your dish will be fine but without seeing it it's hard to know how bad it was compared to mine. Chances are you won't notice a difference either if you get a replacement.
 
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sectoid1

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Hey all :)

Could you please advise what elevation and azimuth I should set my 1M dish for those 3 satellites? My dish is pointing at Hotbird 13E, so should the elevation and azimuth be set for this satellite or somewhere in the middle between?

Elevations for each satellite are as follows:
13E - 27.3°
19.2 - 25.8°
28.2E - 22.8°

Azimuth (true):
13E - 161.2°
19.2E - 153.9°
28.2E - 143.8°

Azimuth (magn.):
13E - 163.3°
19.2E - 156.0°
28.2E - 145.9°

Thanks!
 
A

Archive4

Guest
Hey all :)

Could you please advise what elevation and azimuth I should set my 1M dish for those 3 satellites? My dish is pointing at Hotbird 13E, so should the elevation and azimuth be set for this satellite or somewhere in the middle between?

Elevations for each satellite are as follows:
13E - 27.3°
19.2 - 25.8°
28.2E - 22.8°

Azimuth (true):
13E - 161.2°
19.2E - 153.9°
28.2E - 143.8°

Azimuth (magn.):
13E - 163.3°
19.2E - 156.0°
28.2E - 145.9°

Thanks!
To correctly advise would need to see lnb holder assembly to see if it has been pre-set to adjust for the three sats you're after.

Post a pic!
 
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sectoid1

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Hey, sorry, dont have a good quality camera to take a good picture as the dish is quite high above the ground.
It's basically a Gibertini holder, the same as this onegirt4.jpg, and it wasn't modified in any way, as far as I know.
 
sonnetpete

sonnetpete

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Laminas 1.2M fibre dish with an IBU, on a Clarke Tech USALS motor, covering 57E - 24.5W to an Octagon SX88. Displayed on a 20" Dyon LED TV.

Seperate 80 cm dish on 28E with a Humax Freesat for SWMBO.
Free Sat V8 meter. Sony Bravia 46" LCD, Sony BluRay and Home Cinema.
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Which sat is your dish focused to? To be honest, the elevation and azimuth figures you've quoted aren't very useful if you are trying to set up a multisat bracket. I'm not familiar with that particular Gibi bracket, having a different type (see photo)
Gibi.JPG
I've only ever set up lnb postioning (height and offset) by using a meter and adjusting the LNB's to find the optimum spot for reception. If your dish is at a height you may find alignment by this method to be inconvenient. (Most of my dishes are either just above or below head height). Don't be surprised if the LNB extension bar has to be tilted at more of an angle than you think. (See below)
TD88.JPG
 
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sectoid1

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none at the moment
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Thanks sonnetpete.

I think the lnb bracket is very similar to yours.

I know that the elevation and azimuth above wouldn’t be helpful for multi lnbs but I posted that as I wanted to know if the dish would have to be set for example in the middle of all 3 satellites (e.g. elevation 25 deg) or specifically for the one the dish is focused to. Mine is focused at HB 13E, so elevation 27.3 deg.

I also know that the lnbs would have to be aligned individually, but if the elevation is wrong, wouldn’t it be more difficult to align them?

Unfortunately the dish couldn’t be installed lower as there are few obstacles in front of my house, so the only way to get to the dish is a high ladder :)
 
sonnetpete

sonnetpete

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Messages
7,559
My Satellite Setup
Laminas 1.2M fibre dish with an IBU, on a Clarke Tech USALS motor, covering 57E - 24.5W to an Octagon SX88. Displayed on a 20" Dyon LED TV.

Seperate 80 cm dish on 28E with a Humax Freesat for SWMBO.
Free Sat V8 meter. Sony Bravia 46" LCD, Sony BluRay and Home Cinema.
My Location
Normandy, France
if the elevation is wrong, wouldn’t it be more difficult to align them
In essence you are correct but if you align with one LNB in the central position (as if for a single sat dish) the bar and the LNB's will then be relatively easy to align. You may make the task easier if you have 28E and 13E on either side of 19E.
 
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sectoid1

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Cool, thanks.
The purpose of the dish being focused on 13E instead on 19E was the 13E being the weakest satellite here (that what I was told).

Anyway, I think I get the idea now. Thanks a lot!
 
sonnetpete

sonnetpete

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Staff member
Messages
7,559
My Satellite Setup
Laminas 1.2M fibre dish with an IBU, on a Clarke Tech USALS motor, covering 57E - 24.5W to an Octagon SX88. Displayed on a 20" Dyon LED TV.

Seperate 80 cm dish on 28E with a Humax Freesat for SWMBO.
Free Sat V8 meter. Sony Bravia 46" LCD, Sony BluRay and Home Cinema.
My Location
Normandy, France
The purpose of the dish being focused on 13E instead on 19E was the 13E being the weakest satellite here (that what I was told).
I don't think there's a significant signal level difference between all three satellites to be honest....
 
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Archive4

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I don't think there's a significant signal level difference between all three satellites to be honest....
Shouldn´t be too much difference, but I´m only a Wizard, not a specialist! I would think the lnb assembly should be " pre set " to adjust for elevation difference and should advise which lnb to use for primary alignment, as many monoblock lnb´s do. ( Haven´t had to play with multi lnb holders so far, I know I will regret that statement )
Well, in a perfect world!
 
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sectoid1

Regular Member
Messages
39
My Satellite Setup
none at the moment
My Location
Manchester
Thanks for all your help!
 
sonnetpete

sonnetpete

Grumpy Old Moderator
Staff member
Messages
7,559
My Satellite Setup
Laminas 1.2M fibre dish with an IBU, on a Clarke Tech USALS motor, covering 57E - 24.5W to an Octagon SX88. Displayed on a 20" Dyon LED TV.

Seperate 80 cm dish on 28E with a Humax Freesat for SWMBO.
Free Sat V8 meter. Sony Bravia 46" LCD, Sony BluRay and Home Cinema.
My Location
Normandy, France
I would think the lnb assembly should be " pre set " to adjust for elevation difference and should advise which lnb to use for primary alignment, as many monoblock lnb´s do.
If I can shed a little light perhaps...I've had four or five differing multi LNB brackets in the past. I've never seen one with any markings, because the spacing between LNB's would be different dependent on dish size. Similarly you can use one for different sectors of the arc without a defined central focus satellite. I have set one up with two sats on either side of the LNB arm, by using a short length of 40mm plastic pipe in the dish LNB holder to hang the bracket from.
 
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Archive4

Guest
As stated, I am not a specialist, would have thought multi-lnb assemblies may have been pre-set, but having looked at the photos and done some research on the www I can see that they are not. Sorry for any miss-information.
I´m only a Wizard! And I fix any problem I come across.
Can now see the assemblies are very flexible in their design, allowing for many computations of intended target satellites.
That said, from my limited experience, I would line the dish up on the weakest signal, not the mid point satellite. The reason I say this is due to experience in my part of Spain using Monoblock lnb´s for Dutch and Belgium systems. The book states line the dish up on 19.2 and the lnb will find 23.5, but from experience with smaller dishes, it is better to reverse the lnb and align the dish to 23.5 and let 19.2 take care of itself! ( It always works )
Well.........perhaps........not always

Do wonder how they ( multi-lnb ) would work in an area with more elevation differential?
 
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