Not all dishes can take regular LNB's for 97W and 101W

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polgyver

polgyver

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For a few years I was happy with 5 (now only 4) FTA programs on 101W.A few weeks ago I started experimenting with receiving also 160 programs from 97W. For temporary support of LNB I used rectangular piece of plastic, which is very transparent for satellite waves. Luckily, this kind of plastic lowered the S (strength of signal) only by 1 or 2, despite its thickness of 3/8" (about 9 - 10 mm) ; other, thinner plastics lowered S by 8 to 10. I tried 4 dishes : SeeSat 33", Q-sat 40" and Multistar with its twin Digiwave (both are identical, 36"). Using a sharpie marker I marked positions of LNB with maximum signal strength for both satellites. Surprisingly, the biggest dish, Q-sat, could not accept 2 LNB's - its focal length is too small. But the Multistar and its twin Digiwave fit the job - the LNB's "overlap" just a bit. I did some grinding of the LNB's edges on a sandpaper and glued them together with contact cement, and now I can watch many programs from both satellites. IMG 3798 IMG 0110 IMG 0118 IMG 0009
 
FaT Air

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Very ingenious. (adjective 1. characterized by cleverness or originality of invention or construction. 2. cleverly inventive or resourceful.)
 
xtgold

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I have seen lnbs removed from their plastic cases to make them easier to mount close.
 
KE4EST

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I do stuff like this all the time just to see what I can make work:D
 
polgyver

polgyver

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I have seen lnbs removed from their plastic cases to make them easier to mount close.
This is good idea. Maybe it will be enough just to cut a quarter inch of each case of LNB with a bandsaw, just this parts where they need be closer.This way I could use them on Q-sat dishes. Their median focal length is only 22", despite rather big size (40" x 35")
 
T4Runner

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I'm sure you are aware that one of the Sponsors (Glorystar) sells a specially made bracket and two small LNB's (SLR1) that are designed for this very purpose? But there's no experimental excitement with that choice!
 
polgyver

polgyver

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I'm sure you are aware that one of the Sponsors (Glorystar) sells a specially made bracket and two small LNB's (SLR1) that are designed for this very purpose? But there's no experimental excitement with that choice!
Well, in fact I did not know it, I just looked it up after your suggestion, and that is the proper way to do a setup, using small ones, without cutting regular LNB's. I see that you use two sets for receiving 97/101 : one on 30" dish, the other on 36 dish. Probably the spacing between LNB's is different for each dish, am I right?
 
xtgold

xtgold

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I have seen lnbs removed from their plastic cases to make them easier to mount close.
I used that trick in the circular lnb days with a dish lnb that is normally D mount,remove from plastic fatten up the throat and use it as 40mm throat mount.
 
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