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Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
Dish Setup Guides, Information threads and FAQs
Calculation of the focal length of an offset satellite dish antenna, Revisited
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<blockquote data-quote="a33" data-source="post: 1157066" data-attributes="member: 332642"><p>Hi [USER=419680]@ea3cv[/USER] , and welcome to the forum!</p><p><img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite80" alt=":-welcome1" title="Welcome 1 :-welcome1" loading="lazy" data-shortname=":-welcome1" /></p><p></p><p>I'm perfectly willing, when you supply me your input data, to enter them in my spreadsheet, and share the results.</p><p></p><p>I assume you know, that the measures (height, width, depth(s)) must be taken just for the parabolic working area of the dish, so not including the dimensions of the rim.</p><p>And all measures to the millimeter precise, depth even to parts of a mm precise, when possible.</p><p></p><p>Do you have a special dish, or special project, that you would want the calculations for?</p><p></p><p></p><p></p><p>Alas, there doesn't seem to be much interest in the calculations on parabolic/paraboloid dishes nowadays. That is why most of my projects for calculating on dish geometry are on hold.</p><p>Instead I recently managed to derive/develop a way to calculate multifeed skew angle precisely (many calculators give quite different values, so are just estimates from often unclear calculations, I would say), </p><p>and am presently considering the 'modified motor angles' for satellite motor setups again (many charts give forward axis tilt values that unnecessarily overcompensate, I found).</p><p></p><p></p><p>Greetz,</p><p>A33</p></blockquote><p></p>
[QUOTE="a33, post: 1157066, member: 332642"] Hi [USER=419680]@ea3cv[/USER] , and welcome to the forum! :-welcome1 I'm perfectly willing, when you supply me your input data, to enter them in my spreadsheet, and share the results. I assume you know, that the measures (height, width, depth(s)) must be taken just for the parabolic working area of the dish, so not including the dimensions of the rim. And all measures to the millimeter precise, depth even to parts of a mm precise, when possible. Do you have a special dish, or special project, that you would want the calculations for? Alas, there doesn't seem to be much interest in the calculations on parabolic/paraboloid dishes nowadays. That is why most of my projects for calculating on dish geometry are on hold. Instead I recently managed to derive/develop a way to calculate multifeed skew angle precisely (many calculators give quite different values, so are just estimates from often unclear calculations, I would say), and am presently considering the 'modified motor angles' for satellite motor setups again (many charts give forward axis tilt values that unnecessarily overcompensate, I found). Greetz, A33 [/QUOTE]
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Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
Dish Setup Guides, Information threads and FAQs
Calculation of the focal length of an offset satellite dish antenna, Revisited
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