this site may help you www.satellitehelp.com go to installation Andyvan ----- Original Message ----- From: ocsrc1 To: [email protected] Sent: Wednesday, January 02, 2008 10:09 AM Subject: [TVRO] Re: Need help with measurement on 5 foot dish support arms
I used ( D*D ) / 16/d = f d=depth of dish D=diameter of dish f=focal distance f/D = focal depth for feedhorn I have to plug the numbers into the triangle formula and see what they come out to. Now that I know that the focal distance is from the bottom of the dish to the feedhorn I should be able to temp. mount the feedhorn and take some measurements to be sure. Building the mounts is the next tough step. 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 > > > > > [Non-text portions of this message have been removed]
