Primestar dish, which LNB is best?

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TMair

SatelliteGuys Pro
Original poster
Jan 12, 2010
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Midway, Utah
I have a primestar dish, the ovol shaped one, anyway the LNB went junk, I am wondering if there is a good aftermarket LNB that would work well with it, or if I should just forget it and get a new/different dish and LNB set up?
Any help would be greatly appresheated.
Thanks
Terry
 
Depends what satellite(s) you watch. Consider the Invacom QPF-031 circular/linear or the SNF-031 linear LNB? Voltage polarity switching built-in is a plus.
 
There are three original-looking soup-can-sized LNBs that I can think of.
The really old one has two outputs, one for V only and the other for H only.
Then another has one output, voltage controlled.
And I think there's an aftermarket model with two voltage controled outputs.
You can find them at the link wescopc gave above, or on eBay.

Certainly any flange mount LNB from Invacom, denoted with the F, eg: QPF-031, etc. would be an excellent choice.

And a last choice, is a bandstacked FSS LNB originally deployed on DishNetwork SuperDish antenna.
(if you look for them, you can find 'em)

BUT, for All solutions, you want to reuse the Original FeedHorn!
All these LNBs mount to the original feed that matches your dish!
If you had a small round Primestar, any LNBF might get the job done, but on the elliptical dishes, you need the (original) matching feed to get maximum performance.
 
Does anyone know if the new ESX521 would perform noticeably better than the ole DMX521 on a round Primestar?
 
I just took a hole drill to a piece of wood then clamped to the primestar I just shaved about half of the aluminum away, (took the pilot drill out). The LNB is being held with a duct clamp cut and I used a nail to punch the slot to allow the screws to hold the LNB. Worked for me.
 

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I just took a hole drill to a piece of wood then clamped to the primestar I just shaved about half of the aluminum away, (took the pilot drill out). The LNB is being held with a duct clamp cut and I used a nail to punch the slot to allow the screws to hold the LNB. Worked for me.

While a regular LNBF can be retrofitted onto the primestar dish, the performance will be much less than using the factory feedhorn / scaler. The off the shelf LNBF that was attached is over / under illuminating the reflector and picking up noise behind the dish in the over illuminated areas or missing desirable signals because it doesn't see other under illuminated areas of the dish.
 
I found the original PrimeStar lnb, made in Japan, performs quite well. I have two in service using one 4X4 Zinwell switch that handles the polarity switching to the individual ports.
 
Which model? There were 2 oval ones

84e is 40x30
75e is 37x27

Darned if I know, my dish is gray in color, it is eliptical, the LNB that is on it is bigger then a sardine can, but flat like that, the feedhorn part of it is kind of wege shaped and had what looks like cellifain covering it.
 
I found the original PrimeStar lnb, made in Japan, performs quite well. I have two in service using one 4X4 Zinwell switch that handles the polarity switching to the individual ports.

I would prefer to use the one that came with it, but I am afraid it has died, don't know if I killed it some how (my guess is I did) or if it just gave up the ghost, so anyway not wanting to get rid of the dish I would like to just use an LNB, but would also like to take full advantage of the dish.
Terry
 
Terry,

It sounds like you still have the original equipment, which although old, should still perform well. Any chance for a picture? Maybe all you need is a Zinwell switch to merge two polarities into one voltage controlled. Easy, works good.
 
Depends what satellite(s) you watch. Consider the Invacom QPF-031 circular/linear or the SNF-031 linear LNB? Voltage polarity switching built-in is a plus.

I guess I should have mentioned this...duh, anyway I would like it specificly for 101 W at this time anyway.
Thanks
Terry
 
This is the LNB I use with PrimeStar 75E

I have found this Hughes LNB works very well with my PrimeStar 75E.

It has a larger feedhorn than others I have seen - - - and works very well. :up
 

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Terry,

It sounds like you still have the original equipment, which although old, should still perform well. Any chance for a picture? Maybe all you need is a Zinwell switch to merge two polarities into one voltage controlled. Easy, works good.

Yes I have all original equipment, it used to work on, well I can't remember which sat it was, there where a lot of RetroTV channels on it, anyway it worked great, but now I can't even get it to show signal, or quality readings at all, that is why I am assuming it is the LNB, I have adjusted the up down, and side to side, I can't get anything, I would think, from when I set it up that I should be able to find atleast something with it, but nothing, if anyone has any suggestions I am open.
Thanks again
Terry

Edited to add, the LNB twists freely on the holder, like there is no resistance, don't know if that means anything or not.
Thanks again
 
Yes I have all original equipment, it used to work on, well I can't remember which sat it was, there where a lot of RetroTV channels on it, anyway it worked great, but now I can't even get it to show signal, or quality readings at all, that is why I am assuming it is the LNB, I have adjusted the up down, and side to side, I can't get anything, I would think, from when I set it up that I should be able to find atleast something with it, but nothing, if anyone has any suggestions I am open.
Thanks again
Terry

Edited to add, the LNB twists freely on the holder, like there is no resistance, don't know if that means anything or not.
Thanks again


I thought my Primestar 84E lnb was dead. Until I hooked it up directly to my receiver. Maybe you should do the same and see if the signal level is high
 
Any C-120-flanged LNB should work well with that dish. The important thing is that you keep the original feedhorn, as that is tuned for maximum performance on that particular model dish.
 
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