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This would probably be better in the FTA section, but apparently the moderators don't think I'm l33t enough to post there, thus I will post here and hope that the smart people actually will see it.

I put in a 1.2M 1130 Prodelin this week with an Invacom QPF-301 connected to a WR75L feed horn that came with the Prodelin Dish and NPR from a local college.

After a very uneventful install, I first wanted to test out my 2 problem birds, 82W and 148W.

Much to my surprise, I could not get a blip.

I then did a sweep of the sky and didn't really find anything. Assuming the meter or the cable must be bad, I went ahead and changed both.

Still no signal.

So I started a very slow and methodical search of the sky to find anything.

Finally in a very small precise location I found 91W. Moving on I was able to locate 101W, 110W and 119W. There was not a lot of spill over in these signals, which I assumed was because it tightly focused the beam.

So I went ahead and threw 119 into a Dish and Directv STB. Surprisingly, the signal was less than my .9 Toroidal with a 0.6 lnb. As it turns out, the signal is even less than a Dish 500 on 119.

Obviously when the signal is that attenuated, I am not going to see 82W or 148W as the idea was to see what signal I could get from them - not fight to get 101,110 or 119W.

I have spent the day corresponding with a number of commercial satellite installers (IE, not the $50 per install Dish/Directv idiots).

After thinking about this most of the day, they believe that possibly, the WR75L is primarily for linear and I was trying to pick up a circular bird. 99.9% of their customers use the Linear feed and the circular is "Just because they can".

Could the circular part of the INVACOM be attenuated by the rectangular WR75 opening in the flange.

Would it make any sense to try and loose the Linear opposite rejection part of the feed by ROUNDING out the flange to match the opening in the INVACOM LNB.

The metal is very soft and can probably be filed or even cut with a utility knife.

I guess I could order a circular feed horn from Prodelin, but then again, nothing from Prodelin is cheap - and most likely I would say 'I could of done that !" when I the other.

I have seen some older feed horns before they built the linear rejection into the flange that people used to put a donut into the opening for orientation to Linear. If you leave out the donut it's a Neutral or a Round piece of pipe so to speak.

Is there any logic to this or does it sound like a bigger issue somewhere?

I really wanted to use this dish to lock in 82W and/or 148W, as well as 89W Linear, which brings up the next question. What motor and controller assembly would I need for the Prodelin 1.2 Meter? Dish specs are here.

Thanks.