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Adapting LNBF to a Prodelin Dish

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J

Juan-Argentina

Active SatelliteGuys Member
Original poster
Mar 5, 2012
19
2
Ituzaingo Corrientes Argentina
Hi again, Im trying to get the best signal as possible with my prodelin dish, because the original feed horn is not ready for common LNBs.
I already have the c band adapter, but I couldnt get good signal.
If there is some users that have gotten a good signal adapting a lnb to this prodelin, I´d like to see how does it work better.
Sorry for my English, I´ll post some pics about how it looks, and the original feedhorn
Thanks to all!
 

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After looking at the pictures it looks like you need to adjust your LNBF mount. Bend it back so it points just below the center of the dish. Also the scalar ring needs to be better aligned with the LNBF. It's on there crooked.
 
Reactions: Titanium and Juan-Argentina
For best results put the original feed horn back on the dish the way it was originally. Note the position of the feed horn, the angle and the distance from the dish. Now mount your replacement LNBF in the same position.
 
Reactions: madmadworld and Titanium
Juan-Argentina said:
Thanks, I forgot to say, in that picture Im pointing to Eutelsat 113 W which the elevation is just about 20°
Click to expand...
Closer to 27°S i would think. At any rate your dish elevation isn't correct either. You need to raise it. From my perspective it looks about 20° too low.
 
It would be good if is possible that, but, I´ll show you some pictures of the problem I have
 

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I don't want you to use the original scalar and feed. I want you to put the replacement LNBF you have in the exact same spot. The same angle. The same distance from the dish. You can't just bolt it on the arm and expect it to work as is.
Another thing that might help is to follow the procedure for aligning a polar mount dish. You start with aiming at your "Due South" or in your case "Due North" satellite at 58°W I believe. Trying to align a dish using a satellite 55° west of you is almost impossible.
 
Reactions: Juan-Argentina
Thanks a lot for helping, I´ll try as you said and will post then.
 
Reactions: Magic Static
Juan-Argentina You have nice dish and I am sure you can get good reception with it. But. you need to follow some common rules in setting it up. Firstly you have to have LNB located in the right position and point it to the proper direction. From your picture I see that LNB is located completely wrong (red line). As it is already mentioned you should lean LNB and point it along the green line.
Just trow away LNB-holder you are using and install simple metal holder made of threaded rods and pipe-clamp. With it is possible to adjust LNB perfectly. There is couple of pictures of my antenna.
Do you know the offset angle of your antenna?
 
Reactions: madmadworld and Juan-Argentina
Thanks a lot! You're right. Im going to try as you say. Just I need time but I think this week. I will let you know about it. Thanks for the picture. They'll help me a lot
 
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