Doug, Sorry for the confusion.
Using North as 0 degrees reference. Top to Bottom. #1 90 270 150 210 #2 90 270 180 180 #3 75 285 145 215 I hope this helps out. Charles Miller ----- Original Message ----- From: "n3dab" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Saturday, April 08, 2006 9:17 PM Subject: [Repeater-Builder] Re: Hypothetical dipole antenna question > Charles, > > Thank you for response. It prety much confirms my suspitions but I > didn't have a modeling program to check it out My inent was to > install the dipoles as indicated in my 2nd arrangement 1 E./1 w. and > 2 S. in that order top to bottom. Your option 1 and 2 are clear but > I'm not sure I fully understand the arrangement in you 3rd option. > Can you give me the orientation from top to bottom of the 4 dipoles > based on the compass bearing each is pointed to, with N. being 0 > degrees for option #3. > > Again thanks and 73 > > Doug N3DAB > > --- In [email protected], "Charles Miller" <ham- > [EMAIL PROTECTED]> wrote: > > > > Doug, > > > > I have 3 patterns for you. > > > > First, If you do not want any signal to go "N" and the signal > equal around > > to the South then take the dipoles and place them in a 60 degree > > orientation. The 2 on the top section should be 180 from each other > to the > > East and West and the 2 on the bottom should set at a 60 degrees. > The 2 > > lower dipoles should be aligned 30 degrees to the east and West of > the South > > alignment. > > > > This will give you a fairly good pattern for the area that you want > to > > cover. > > > > The second pattern that will work is to place the dipoles in a 70 > degree > > pattern. Using South as the Zero degree alignment, 1 each at 35 > degrees to > > the East and West and the others at 70 degrees past that. This will > leave a > > 150 degree arc or 75 degrees off North. This will provide a little > to the > > North but not very much. > > > > The first or second will work very well. If you need a little more > to the > > south then take the top at 180 degrees and the bottom towards the > south at > > 90 degrees. This will give you a little more gain to the South than > to the > > East and West. > > > > We had to do this in South Texas to keep a FED signal out of > Mexico. The > > first is the one we used and it is still in use today. > > > > Charles Miller > > > > ----- Original Message ----- > > From: "n3dab" <[EMAIL PROTECTED]> > > To: <[email protected]> > > Sent: Saturday, April 08, 2006 1:23 PM > > Subject: [Repeater-Builder] Hypothetical dipole antenna question > > > > > > > 73 to the Group. Since there is a current discusion ongoing > related to > > > dipole antennas I would appreciate any comments about the > hypothetical > > > situation below: > > > > > > Asumming a DB224E antenna with 4 dipoles, top mounted on a tower, > and a > > > coverage area that is a 270 degree arc (E,S and W.) from the > antenna, > > > the remaing 90 degree segment (N.) being blocked by nearby and > much > > > higher terrain, what is the best orientation of the dipoles on > the mast > > > to provide the max. coverage to the 270 degree arc. all other > things > > > aside. > > > > > > All dipoles aligned on one the S.face of the mast. > > > 2 dipoles facing S., 1 facing E. and 1 facing W. > > > @ facing SSE. and 2 facing SSW. > > > 1 E., 1 SSE., 1 SSW., and 1 W. > > > or some other arrangement > > > > > > TIA > > > Doug N3DAB > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > Yahoo! Groups Links > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > Yahoo! Groups Links > > > > > > > > Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
