Log in
Register
Menu
Log in
Register
Home
What's new
Latest activity
Authors
Forums
New posts
Search forums
What's new
New posts
Latest activity
Members
Current visitors
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
Satellite TV receivers & systems support forums
Satellite Systems - What to Buy - What to install
Make Gregorian dish
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="archive10" data-source="post: 901817"><p>No, you don't want a parabolic sub-reflector. A Parabolic reflector would convert your incoming cone of wavefronts into a circular (tubular) wavefront again, much as the one picked up by your first reflector coming from the satellite.</p><p></p><p>Instead, you want the end of an ellipsoid (of which the sphere is a special case with both focal points (pins holding the string) co-inciding). This will reflect the incoming cone properly into a single point (if positioned as RimanTSS has drawn above as 'C').</p><p></p><p>Don't worry, this is by no Means straightforward - calculating and creating a proper reflector system is not easy, especially if you do not have access to precision milling and metal workíng equipment. But you may get remarkable results if you try hard enough! (That's what's so fun about this - figuring out the shortcuts and can-do stuff.).</p></blockquote><p></p>
[QUOTE="archive10, post: 901817"] No, you don't want a parabolic sub-reflector. A Parabolic reflector would convert your incoming cone of wavefronts into a circular (tubular) wavefront again, much as the one picked up by your first reflector coming from the satellite. Instead, you want the end of an ellipsoid (of which the sphere is a special case with both focal points (pins holding the string) co-inciding). This will reflect the incoming cone properly into a single point (if positioned as RimanTSS has drawn above as 'C'). Don't worry, this is by no Means straightforward - calculating and creating a proper reflector system is not easy, especially if you do not have access to precision milling and metal workíng equipment. But you may get remarkable results if you try hard enough! (That's what's so fun about this - figuring out the shortcuts and can-do stuff.). [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Satellite TV receivers & systems support forums
Satellite Systems - What to Buy - What to install
Make Gregorian dish
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
Accept
Learn more…
Top