We used a Scientific Atlanta turntable on top of a 5 story building with the signal source ground mounted about 500 ft away. The turntable was tilted to be at right angles to the signal source. The E-Systems range was available at the time. WR5ADU and WR5ADV were issued with that antenna pattern submitted.
Many folks just drew a circle and submitted that along with the application, but we throught they were serious about an actual antenna pattern. 73 - Jim W5ZIT --- On Wed, 7/1/09, Chuck Kelsey <[email protected]> wrote: From: Chuck Kelsey <[email protected]> Subject: Re: [Repeater-Builder] DB-224 patterns on side of tower. To: [email protected] Date: Wednesday, July 1, 2009, 5:59 PM Did you do any others? I'm guessing that this was done on the Decibel antenna range, maybe? Chuck WB2EDV ----- Original Message ----- From: Jim Brown To: Repeater-Builder@ yahoogroups. com Sent: Wednesday, July 01, 2009 6:46 PM Subject: Re: [Repeater-Builder] DB-224 patterns on side of tower. Back when we had to submit an antenna pattern in order to get a repeater license for the ham bands, I mounted four elements of a DB-224 directly on one leg of a Rhon 25 tower and mounted the two tower sections on an antenna test pedestal and ran the pattern. With the antenna sections directly in line and pointed away from the tower, we had 9 dB gain in the favored direction, 6 dB gain at plus and minus 90 deg, and 3 dB gain off the back side of the tower. The plot was perfectly round with the 3 dB offset for the center point of the plot. 73 - Jim W5ZIT
