Why drill new holes? Just flip the loops... Dave Baughn wrote: > All of the DB dipole (loop) antennas I have seen have holes near the > bottom of the loop for water to escape. I don't know why you couldn't > mount the antenna upside-down and drill new holes near the new bottom. > You might also inspect the rest of the antenna to see if there is > anywhere that it may collect water when mounted inverted. > > These antennas are not normally designed for any beam tilt or null fill > so the radiation pattern should be fine. > > Dave Baughn > Director of Engineering > The University of Alabama > Center for Public Television and Radio > WVUA/WUOA-TV & WUAL/ WQPR/ WAPR FM > Box 870150 > 195 Reese Phifer Hall, 901 University Blvd. > Tuscaloosa, Alabama 35487 > 205.348.8622 cell 205.310.8798 > NEW EMAIL [EMAIL PROTECTED] > > >>> "Jamey Wright" <[EMAIL PROTECTED]> 3/6/2007 4:06 PM >>> > > I'm sure this has been covered here before but I'll ask again. > > I have the opportunity to place a repeater at a very good site. I can > probably get an antenna at the 250 ft mark on the tower. The repeater > would be in the 444.xxx range so I was looking at using either a DB408 > or a DB420. The catch is that there is already a DB224 on that same > mount so I was thinking I could invert my 2 choices for an antenna hang > it from the bottom of the bracket. The mount is a 6 Ft sidearm on a > Rohn 80 tower so it is beefy enough to handle the 2^nd antenna. My > question is this: Will inverting the antenna create any pattern > problems or send all of my signal into the ground? > > Thanks for the input. > > Jamey Wright > > KD4SIY >
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