Using an old Primestar dish, the feedhorn from the Primestar LNBF, a disused 105 FSS LNBF unit, and a critical part from a fried 105 SuperDish type 2 110 LNBF, I have successfully built a dish that receives 118 KU circular signal. This, integrated with the DPP44 and the repurposed and zip-tied Superdish that gets 110, and 119 gives me the equivalent of the new, rare and expensive DISH500+, taking up only four times the backyard space of a real one. I could add another LNBF at 129 for a DISH1000+ equivalent.
I must give credit to Smith, P as it was his posts here and elsewhere that inspired this, specifically how to convert a linear LNBF to circular. He did the initial work but many of us would agree, his writing style leaves much to the imagination and much to be figured out through constant research.
With slight trimming, the dielectric barrier found within the SD-type2 110 LNBF (the pencil-point one) can be made to fit within the PrimeStar feedhorn. The 105 FSS LNB is attached to the feedhorn and adjusted for proper skew, then the dielectric piece is inserted at a 45 degree angle into the feedhorn. (this leads me to believe that the 110 piece, were it not fried, is now a linear LNBF for DBS frequencies, if such a thing were useful).
This was a fun and frustrating project. I am successfully getting KBS World (channel 9850) and the "Congratulations, you have 118" placeholder.
Photos: back view, front view, side view, skew adjustment, superdish lnbs. Note the dielectric piece inside the feedhorn is at a 45 degree angle relative to the LNB as adjusted for skew, not the feedhorn itself. The superdish was repointed by peaking the original 110 LNB on 119, thus 119 becomes 129 and the one added on the other side becomes 110. The skew had to be adjusted, increased signal on average about 5-10 points per transponder.
I must give credit to Smith, P as it was his posts here and elsewhere that inspired this, specifically how to convert a linear LNBF to circular. He did the initial work but many of us would agree, his writing style leaves much to the imagination and much to be figured out through constant research.
With slight trimming, the dielectric barrier found within the SD-type2 110 LNBF (the pencil-point one) can be made to fit within the PrimeStar feedhorn. The 105 FSS LNB is attached to the feedhorn and adjusted for proper skew, then the dielectric piece is inserted at a 45 degree angle into the feedhorn. (this leads me to believe that the 110 piece, were it not fried, is now a linear LNBF for DBS frequencies, if such a thing were useful).
This was a fun and frustrating project. I am successfully getting KBS World (channel 9850) and the "Congratulations, you have 118" placeholder.
Photos: back view, front view, side view, skew adjustment, superdish lnbs. Note the dielectric piece inside the feedhorn is at a 45 degree angle relative to the LNB as adjusted for skew, not the feedhorn itself. The superdish was repointed by peaking the original 110 LNB on 119, thus 119 becomes 129 and the one added on the other side becomes 110. The skew had to be adjusted, increased signal on average about 5-10 points per transponder.
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