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Satellite Systems - What to Buy - What to install
Make Gregorian dish
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<blockquote data-quote="Riverblue" data-source="post: 902144" data-attributes="member: 389552"><p>Okay, getting a bit clearer. Just to clarify I'm getting this right</p><p>post<span style="font-family: 'Lucida Grande'"><span style="font-size: 12px">#</span></span><span style="font-family: 'Georgia'"><span style="font-size: 15px">62 . . . The line b → F1 → A is the line from the top of a 1.2cm CM dish to the bottom of the sub = 1211mm (parabola 4 measurement) + 208mm (b → F1)</span></span></p><p><span style="font-family: 'Georgia'"><span style="font-size: 15px"></span></span></p><p><span style="font-family: 'Georgia'"><span style="font-size: 15px">The line a → F1 → B is the line from the bottom of a 1.2cm CM dish to the top of the sub = 712mm (parabola 4 measurement) + 161mm (a → F1)</span></span></p><p><span style="font-family: 'Georgia'"><span style="font-size: 15px"></span></span></p><p><span style="font-family: 'Georgia'"><span style="font-size: 15px">The lnb is set at 22.6⁰ because that's the offset of the dish.</span></span></p><p><span style="font-family: 'Georgia'"><span style="font-size: 15px"></span></span></p><p><span style="font-family: 'Georgia'"><span style="font-size: 15px">Wasn't the "phase angle" of the IBU 84⁰, so why are we using 82⁰, is there a reason?</span></span></p><p><span style="font-family: 'Georgia'"><span style="font-size: 15px"></span></span></p><p><span style="font-family: 'Georgia'"><span style="font-size: 15px">How did you get your measurements in the diagram, did you draw it to scale 1:1 and just measure them off of the drawing, or did you use mathematics?</span></span></p><p><span style="font-family: 'Georgia'"><span style="font-size: 15px"></span></span></p><p><span style="font-family: 'Georgia'"><span style="font-size: 15px">The leaning angle of the sub is the angle at point b between the red and the blue line?</span></span></p><p><span style="font-family: 'Georgia'"><span style="font-size: 15px"></span></span></p><p><span style="font-family: 'Georgia'"><span style="font-size: 15px">The depth of the sub is the distance between the blue line and the edge of the ellipse at it's deepest?</span></span></p><p><span style="font-family: 'Georgia'"><span style="font-size: 15px"></span></span></p><p><span style="font-family: 'Georgia'"><span style="font-size: 15px">F1 → a + F2 → a = F1 → b + F2 → b, 161mm + ? = 208mm + ?, what are the dimensions F2 → a & F1 → b?</span></span></p><p><span style="font-family: 'Georgia'"><span style="font-size: 15px"></span></span></p><p><span style="font-family: 'Georgia'"><span style="font-size: 15px">Sorry if I'm asking too many questions, I just want to make sure that I'm understanding this correctly ;)</span></span></p></blockquote><p></p>
[QUOTE="Riverblue, post: 902144, member: 389552"] Okay, getting a bit clearer. Just to clarify I'm getting this right post[FONT='Lucida Grande'][SIZE=3]#[/SIZE][/FONT][FONT=Georgia][SIZE=4]62 . . . The line b → F1 → A is the line from the top of a 1.2cm CM dish to the bottom of the sub = 1211mm (parabola 4 measurement) + 208mm (b → F1) The line a → F1 → B is the line from the bottom of a 1.2cm CM dish to the top of the sub = 712mm (parabola 4 measurement) + 161mm (a → F1) The lnb is set at 22.6⁰ because that's the offset of the dish. Wasn't the "phase angle" of the IBU 84⁰, so why are we using 82⁰, is there a reason? How did you get your measurements in the diagram, did you draw it to scale 1:1 and just measure them off of the drawing, or did you use mathematics? The leaning angle of the sub is the angle at point b between the red and the blue line? The depth of the sub is the distance between the blue line and the edge of the ellipse at it's deepest? F1 → a + F2 → a = F1 → b + F2 → b, 161mm + ? = 208mm + ?, what are the dimensions F2 → a & F1 → b? Sorry if I'm asking too many questions, I just want to make sure that I'm understanding this correctly ;)[/SIZE][/FONT] [/QUOTE]
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