If you look at many commercial sites, many are pretty close together. I am not saying that is good or bad, but apparently it works for them. Especially if it is on different bands. You can take a close up look at our repeater(s) install; http://disneycrazy.smugmug.com/Other/New-Repeater-Site/7943953_gF4Q3 We have 2 top mounted antennas (db224 and db420) at 300ft, a 2/440/1.2 Diamond and db224 on a side arm at 250ft and then db224 and db420 at 200ft (side arm mount). Close up pictures on all are on the site. The top mounted antennas are 2 side mounts that are HUGE in comparison to what db sells for side mounting those antennas. The vertical pipe is probably 6 to 8" OD. The arms are 3ft and then puts the db224 and db420 at 6ft apart at the top. Note-these top mounted antennas are not on a side arm you normally see cell phone antennas on.
73, Robert KD4YDC --- In Repeater-Builder@yahoogroups.com, "n2len" <n2...@...> wrote: > > I was given the opportunity of placing 3 repeater antennas at the very top of > a 180 foot cellphone monopole tower. A horizontal arm mounted on the top of > the monopole will allow the mounting of my 3 repeater antennas. Horizontal > separation should be no less than 6 feet apart from each other. > > Here are my 2 questions: > > We will be mounting 2 meter, 220, and a 440 repeater antennas. > > 1: > What do you recommend between a choice of either RFS or Telewave Superstation > Master Type or DB224E Dipole type for top mounting? > > Pros and Cons of each. I heard many stories about cracking for both. Wind > load... > These antennas will be top mounted! > Located in the Catskill Mtns, Snow & Ice are problems. High winds etc.... > > 2: What do you feel about the pattern/reflection with having 3 verticals atop > next to each other spaced say 6 feet apart? > > Thank you for your input: > Len N2LEN >
