LNBF holder for PFA

RimaNTSS

RimaNTSS

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As I know from high school geometry lessons, any 3 points can make up a plane. Extrapolating this clause to satellite hardware language, I could say that star-holder is more than enough to hold LNBF or LNB in perfect position when LNB's Phase center is perfectly co-located with antenna's Focal point. Star-holder allows to do so. And there is no need to overmedicate things .... Points are A, B and C, and their positions are dependent on length of the 3 feedarms (in some cases there are 4 feedarms). I've got several out-of-shelve star-holders, and I've made several myself. Of course, nothing can be better than proper pipe-clamp (made of INOX and wide enough). That is my IMHO. Holder for C-band LNB/LNBF looks more or less same but has another clamp as a central part. Actually, C-band LNB holder is more universal, as it can hold not only C, but also Ku and Ka LNBs, only proper spacers should be used.
 

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RimaNTSS

RimaNTSS

Super Moderator
Staff member
Messages
4,815
My Satellite Setup
Some SAT-related hardware.
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N-E from Riga
Have cut couple of 30mm pieces from 168mm (diameter) pipe. To make holders for PFA out of them. When? I do not know...... when have some spare time.
 

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RimaNTSS

RimaNTSS

Super Moderator
Staff member
Messages
4,815
My Satellite Setup
Some SAT-related hardware.
My Location
N-E from Riga
Some time ago I made feedarms and Ku-band LNB-holder for 2.4m PFA of friend of mine. And now, after he is satisfied with Ku-band reception he asked a question whether C-band LNBs with 40mm neck. Of course no, I've said, and you need another holder. :-wow So, I've one today. Used 4mm thick 110mm in diameter "O" ring as a base, 63.5mm clamp. Also made spacer to be able to install Ku-band LNB in the same holder. He already has length-adjustable feedarms, so it is possible to place LNB exactly in the focus of antenna.
 

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M

moonbase

Small Dish Man
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2.0m Precision
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UK
Some time ago I made feedarms and Ku-band LNB-holder for 2.4m PFA of friend of mine. And now, after he is satisfied with Ku-band reception he asked a question whether C-band LNBs with 40mm neck. Of course no, I've said, and you need another holder. :-wow So, I've one today. Used 4mm thick 110mm in diameter "O" ring as a base, 63.5mm clamp. Also made spacer to be able to install Ku-band LNB in the same holder. He already has length-adjustable feedarms, so it is possible to place LNB exactly in the focus of antenna.

Inox ?

Nice job.
 
RimaNTSS

RimaNTSS

Super Moderator
Staff member
Messages
4,815
My Satellite Setup
Some SAT-related hardware.
My Location
N-E from Riga
Yes, sorry, did not tell.... all INOX except 2 brass nuts and plastic spacer. :rolleyes:
 
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