Usals problem & alignment

Channel Hopper

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I never said they were

Dealers claiming 'official' or 'sole' distributor will have received a fair number more reflectors in their time to make up for claimed damage in transit, it used to be rounded up to 3-5% for palletised steel and 6-10% for aluminium (before paint defects) It would be completely in character to sell off surplus numbers without raising peripheral parts orders from source.
 
jeallen01

jeallen01

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In the case of @Red alert's dish,the issue would simply seem to have been the supply of the incorrect length of feedarm - but not the "angle" of which, because that is determined by the arm mount on the dish. Thus any arm with the correct dimensions (width x height x length - and with the correct "cutoff" angles at both ends!) should work per the design, and so simply extending the existing arm by the appropriate distance ought to work.
 
Channel Hopper

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Whilst the above may be true, the LNB clamp that was supplied may also have the wrong angle of dangle for the reflector and so no amount of boom adjustment will correct the error.

The last Gibertini enquiry on this forum relating to multi box supply highlighted the LNB clamp being of a different design and material to that specified by the manufacturer.
 
sonnetpete

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Whilst the above may be true, the LNB clamp that was supplied may also have the wrong angle of dangle for the reflector and so no amount of boom adjustment will correct the error.

The last Gibertini enquiry on this forum relating to multi box supply highlighted the LNB clamp being of a different design and material to that specified by the manufacturer.
The LNB clamp for the Gibertini range, both OP and XP is the same and flat in design...


I'm guessing that the angle of dangle is produced by the way the arm is cut at the LNB end and subsequently, the mounting plate welded to it. Incidentally, Televes has a very similar LNB mounting system (clamp tightened with an allen key) which looks like RedAlert's. Are Televes and Gibertini one and the same entity?
 
jeallen01

jeallen01

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Whilst the above may be true, the LNB clamp that was supplied may also have the wrong angle of dangle for the reflector and so no amount of boom adjustment will correct the error.

The last Gibertini enquiry on this forum relating to multi box supply highlighted the LNB clamp being of a different design and material to that specified by the manufacturer.
As I mentioned earlier when I referred to Trust's post #275, his photos and opinion appear to confirm that the unmodified arm and LNB holder do result in the correct ange (35%) between arm and the axis of the LNB for @Red alert's XP dish - therefore, simply and carefully extending the arm by the appropriate amount should not result in that angle changing or becoming incorrect!

OTOH, whilst "designing" and constructing the extension section, it might even be possible to include a facility to very slightly adjust that angle - and thus "fine-tune" the angle for best reception!
 
Last edited:
Trust

Trust

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As I mentioned earlier when I referred to Trust's post #275, his photos and opinion appear to confirm that the unmodified arm and LNB holder do result in the correct ange (35%) between arm and the axis of the LNB for @Red alert's XP dish - therefore, simply and carefully extended the arm by the appropriate amount should not result in that angle changing or becoming incorrect!

OTOH, whilst "designing" and constructing the extension section, it might even be possible to include a facility to very slightly adjust that angle - and thus "fine-tune" the angle for best reception!
Also two square boxed alu pipes inside the cutted lnb arm will do , even a piece of wood can be used for the test .
 
R

Red alert

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The dish was supplied to me in a box without any manual from Gibertini.

Yesterday I placed a piece of wood between the lnb arm and lnb so there was approx 3cm space between them as a test. Signal slightly improved to 89% on thor. It might actually help if the arm can be adjustable as suggested by @jeallen01. I also like the idea of squared boxed alu pipes. Is there a way to know how long the feed arm should be? Is an overall length of 75cm enough? or does this all depend on the actual specs of the dish i have. I want to try extending the feedarm without any cutting or alot of modifications if possible?

Will a longer feedarm length still give the desired tilt the lnb needs?
 
Channel Hopper

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The dish was supplied to me in a box without any manual from Gibertini.

Yesterday I placed a piece of wood between the lnb arm and lnb so there was approx 3cm space between them as a test. Signal slightly improved to 89% on thor. It might actually help if the arm can be adjustable as suggested by @jeallen01. I also like the idea of squared boxed alu pipes. Is there a way to know how long the feed arm should be? Is an overall length of 75cm enough? or does this all depend on the actual specs of the dish i have. I want to try extending the feedarm without any cutting or alot of modifications if possible?

Will a longer feedarm length still give the desired tilt the lnb needs?

If you think there is nothing else amiss with the outdoor kit , then saw the feedarm in half (not lengthways) and drill two small holes about 2cms from the cut ends.
Find a piece of solid wood that is a friction fit to fit into the ends, measure the total length to make sure it is the same as the correct length and secure using two self tapping screws in the holes you have drilled.
 
Trust

Trust

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Will a longer feedarm length still give the desired tilt the lnb needs?
55 mm longer arm will result in lnb ± 55 mm pointing higher .
edit : be aware that you have to correct the dish elevation after changing the feedarm lenght .

longer feedarm.jpg
 
jeallen01

jeallen01

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55 mm longer arm will result in lnb ± 55 mm pointing higher .
edit : be aware that you have to correct the dish elevation after changing the feedarm lenght .

View attachment 130700
Good reasons for making the extension section length, and possibly the angle, adjustable.
 
jeallen01

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Further thoughts about the possible methods of extending the feedarm:

1) Make & fit a straight piece that will bring the feedarm back exactly to the "factory spec" length and make sure that it is correctly aligned with the 2 parts of the now-cut arm.

2) Realign the dish, mainly in terms of elevation, but also possibly in the declination - that should "get the best out of" the existing dish arm setup in "factory spec configuration"

Then, if you want to experiment further, because, as others have already commented, sometimes the "factory spec" design does not actually point the LNB directly at the actual focal point of the dish!:

3) Mark everything so that all the parts can be refitted later if required, but then remove this extension piece.

4) Make up a second, or maybe even use the same, extension piece which can provide less or more of an extension - and then see if shortening or extending the extension (and thus respectively lowering or raising the point on the dish at which the LNB is aimed) makes any improvement?

5) Make up a third extension piece which gives you some scope to adjust the angle between the feedarm and LNB, install it on the arm to give the same extension as determined in stage 4) and try that out to see if, again, there is/is not any further improvement?
 
Channel Hopper

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antrabe

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This op100 is a good choice to install on a motor is too ligth. im going to wait the final statment about arm to study the possibility to buy one
 
Channel Hopper

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This op100 is a good choice to install on a motor is too ligth. im going to wait the final statment about arm to study the possibility to buy one
The 1m design can be (or used to be) supplied with feed arm supports.
 
jeallen01

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The 1m design can be (or used to be) supplied with feed arm supports.
The feed arm supports are still listed as optional accessories on the Gibertini website - although whether you can actually buy them is another matter!

OTOH: not difficult to make up your own support arms with a couple of lengths of slightly flexible strips of steel with one end of each screwed to the edge of the dish, and the other ends of those clamped to the feedarm near the LNB holder (a car exhaust pipe clamp works quite well for that purpose! :))
 
R

Red alert

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Hi all,

Just received this email from Gibertini.

“ sorry for the delay on the answer but the company has been closed for sometimes for the COVID emergency.
Yes, I confirm you the lenght of 100 cm. dish arm is 75 cm. (65 cm. is for he 85 cm. dish). I suggest you to contact your supplier and ask for the replacment.”

Well fat chance ill get the arm from hm-sat-shop as they refuse to acknowledge that they have sent me wrong one (what an awful company). I want to try and get the real arm for the dish before i start carrying out modifications. I sent an email to Gibertini to check if they are trading and will sell me one.

In the meantime I made this so called contraption to improve signal on thor to 91%. It works for now but not the best.
 

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Hi Red alert, sorry to read about your situation, hope you get it sorted out soon!
 
Channel Hopper

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Hi Red alert, sorry to read about your situation, hope you get it sorted out soon!
I may have a suitable feed support lying around, but making your own from the existing would be the best way forward, go for the chargeback first sincde you have confirmation from the manufacturer the delivered item is not fit for purpose.
 
A

a33

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Well fat chance ill get the arm from hm-sat-shop as they refuse to acknowledge that they have sent me wrong one

Well, maybe they will take a second chance, to solve this issue?
Mail them again ( info@hm-sat.de ) , and ask that your mail is forwarded to Torsten Franke (in the about-line?).
Let's see, if this problem will be taken up more seriously at management level (I got a mail from him myself, so let's see what that mail is worth).

[You might call yourself "der Mann aus Manchester" :) ]

I don't think we must accept wrong arms, and lousy (after-)service on top of that.

Greetz,
A33
 
R

Red alert

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Well, maybe they will take a second chance, to solve this issue?
Mail them again ( info@hm-sat.de ) , and ask that your mail is forwarded to Torsten Franke (in the about-line?).
Let's see, if this problem will be taken up more seriously at management level (I got a mail from him myself, so let's see what that mail is worth).

[You might call yourself "der Mann aus Manchester" :) ]

I don't think we must accept wrong arms, and lousy (after-)service on top of that.

Greetz,
A33
Thanks. I have sent them the email. Lets see what they will reply.
 
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