To use the hypoteneus formula to find the long side of the triangle, you need to remember, that the heigth is not from the dish it'self, but from the imaginary line across the dish. This is where the actual side mount will be placed, if at the outside edge of the dish. If it will be someplace different, such as within the curvature of hte dish, then you'll need to measure from a different point.
Steve ----- Original Message ----- From: "ocsrc1" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Wednesday, January 02, 2008 1:34 PM Subject: [TVRO] Re: Need help with measurement on 5 foot dish support arms >I usd the formula A^ + B^ = C^ > > The h=21 > 1/2 D = 29-3=26 > > 21^=441 > 26^=676 > > 1117(sqrt)= 33" > > I know I'm doing something wrong. The diagram shows 30" > > Where am I making the mistake? Is it the curve of the dish throwing > off my math? > > Thanks > > Bill > > > > > --- In [email protected], "Stephen Smith" <[EMAIL PROTECTED]> wrote: >> >> Focal Point is usually from the center of the dish to the front end > of the >> scalar rings. The end towards the dish. If this is a shallow > dish, it will >> be farther away, obviously. I would double check the dish depth > just to >> make sure. What formula did you use for FP? >> >> Steve >> >> ----- Original Message ----- >> From: "ocsrc1" <[EMAIL PROTECTED]> >> To: <[email protected]> >> Sent: Wednesday, January 02, 2008 12:14 AM >> Subject: [TVRO] Re: Need help with measurement on 5 foot dish > support arms >> >> >> > If my math is correct the Focal Distance is between 21 and 22" >> > >> > But I'm not sure if this from the dead center of the dish or even >> > with the outer edge. >> > >> > If it was dead center then the feedhorn would only be 11" above > the >> > dish edge. >> > >> > If it is from equal with the edge of the dish, then it would be > 31" >> > from the bottom of the center of the dish. >> > >> > Does anyone know which of these is true? >> > >> > Once I have the correct location for the feedhorn, then it form a >> > triange with a 90 degree right angle and I should be able to find > the >> > length of the long side since I would know the 2 other sides. >> > >> > I know there is a formula to do this, but it's been a long time > since >> > I was school. >> > >> > AutoCAD would be able to plug these numbers in and find the > answer in >> > a second. >> > >> > If you have AutoCAD and can make a sketch, or JPG, SWF , or other >> > type of file, please send it to my primary address >> > [EMAIL PROTECTED] >> > >> > Thanks again >> > >> > Bill >> > >> > >> > >> > >> > >> > --- In [email protected], "ocsrc1" <radical.bill@> wrote: >> >> >> >> The dish is 59" wide and 10" deep. >> >> >> >> Hope this helps >> >> >> >> Bill >> >> >> >> >> >> >> >> --- In [email protected], "Geraldo Paiva" <loures@> wrote: >> >> > >> >> > Considering the attachments is being stripped away by Yahoo, >> >> please see the two dimensions I need: dia of dish and depth of >> > dish. >> >> > >> >> > >> >> > !------------------ dia of dish ------------------! >> >> > ...................................................... ---- >> >> > .......................!..................... >> >> > ..................!.............. HOW DEEP >> > IS >> >> DISH >> >> > ............!......... >> >> > ....!.... ----- >> >> > >> >> > >> >> > ----- Original Message ----- >> >> > From: Richard A. Keirstead >> >> > To: [email protected] >> >> > Sent: Tuesday, January 01, 2008 4:36 PM >> >> > Subject: Re: [TVRO] Re: Need help with measurement on 5 foot >> > dish >> >> support arms >> >> > >> >> > >> >> > Yahoo Groups strips away all attachments. You will need to > send >> >> the >> >> > sketches direct to the other person instead of via Groups. >> >> > RAK >> >> > >> >> > Geraldo Paiva wrote: >> >> > >> >> > > I tryed three times to send the sketch. Certainly, >> > Yahoogroups >> >> is >> >> > > blocking the attached sketch, I see. >> >> > > >> >> > > You have already furnished the distanCe between holes of >> >> feedhorn ring >> >> > > (5.3/4"). Ring deep 1'. OK. tHe opening of the feedhorn >> > extends >> >> down >> >> > > 3/4" from the bottom of the ring. OK. >> >> > > >> >> > > Are missing >> >> > > >> >> > > DIAM >> >> > > <------------------------------------------------------> -- > --- >> > -- >> >> > > . . ! >> >> > > . . ! >> >> > > . . ! DEPTH >> >> > > . . ! >> >> > > . . ! >> >> > > . ------- >> >> > > >> >> > > Loures >> >> > > >> >> > > >> >> > > >> >> > > >> >> > > >> >> > > >> >> > > >> >> > >> >> > >> >> > >> >> > >> >> > [Non-text portions of this message have been removed] >> >> > >> >> >> > >> > >> > >> > >> > >> > Yahoo! Groups Links >> > >> > >> > >> > >> > >> > -- >> > No virus found in this incoming message. >> > Checked by AVG Free Edition. >> > Version: 7.5.503 / Virus Database: 269.17.12/1202 - Release Date: >> > 12/29/2007 1:27 PM >> > >> > >> > > > > > > Yahoo! Groups Links > > > > > > -- > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.5.503 / Virus Database: 269.17.12/1202 - Release Date: > 12/29/2007 1:27 PM > >
