Adapting LNBF to a Prodelin Dish

[Juan-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!

 

[Magic Static]

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.

 

[Magic Static]

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.

 

[Juan-Argentina]

Thanks, I forgot to say, in that picture Im pointing to Eutelsat 113 W which the elevation is just about 20°

 

[Juan-Argentina]

Unfortunately Is not possible to use a common lnb with the original feed horn, because the hole is smaller, it doesnt fit

 

[Magic Static]

Thanks, I forgot to say, in that picture Im pointing to Eutelsat 113 W which the elevation is just about 20°

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.

 

[Magic Static]

Unfortunately Is not possible to use a common lnb with the original feed horn, because the hole is smaller, it doesnt fit

You don't want to use it. Just put it on so you can see the correct position for your replacement. Then take it off and position you LNBF in the same spot.

 

[Magic Static]

 

[Juan-Argentina]

It would be good if is possible that, but, I´ll show you some pictures of the problem I have

 

[Magic Static]

It would be good if is possible that, but, I´ll show you some pictures of the problem I have

I'm sorry. I must not be saying it right. You don't seem to understand what I'm getting at. Or I'm not getting what you are saying.

 

[Juan-Argentina]

I'm sorry. I must not be saying it right. You don't seem to understand what I'm getting at. Or I'm not getting what you are saying.

Sorry you. Im just telling that a common lnbf doestn fit on the original scalar because is bigger than the ring hole

 

[Magic Static]

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.

 

[Juan-Argentina]

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" satellite at 58°W I believe. Trying to align a dish using a satellite 55° west of you is almost impossible.

Thanks a lot for helping, I´ll try as you said and will post then.

 

[RimaNTSS]

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?

 

[Juan-Argentina]

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. View attachment 129734
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. View attachment 129735 View attachment 129736
Do you know the offset angle of your antenna?

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