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 <*> 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/
