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<blockquote data-quote="RimaNTSS" data-source="post: 1028533" data-attributes="member: 312276"><p>Feedhorn is calculated for 117* illumination. TBH, I do not know how it was calculated and drawn ..... chap from another forum did all the calculations and drawing. I just removed outer ring from IBU cut sheet of brass and made funnel out of it. It is hard to say how much modified IBU better than original one, and I do not think that would be right thing to compare them as one has illumination angle of 80* and another one 117*.</p></blockquote><p></p>
[QUOTE="RimaNTSS, post: 1028533, member: 312276"] Feedhorn is calculated for 117* illumination. TBH, I do not know how it was calculated and drawn ..... chap from another forum did all the calculations and drawing. I just removed outer ring from IBU cut sheet of brass and made funnel out of it. It is hard to say how much modified IBU better than original one, and I do not think that would be right thing to compare them as one has illumination angle of 80* and another one 117*. [/QUOTE]
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