[TowerTalk] Antenna Mounting on crankup tower top of 3 vertical antennas....
res1q6fs
roger.white at verizon.net
Sat Jan 12 13:32:24 EST 2008
I have a HDX555 and am wanting to mount 3 vertical antennas above my CL-33. I would mount a Comet 3 band antenna (long and skinny co-linear) centered on top of the steel mast above the CL-33 and to each side of the Comet mount a AnteneX 220 3 dB gain antenna and a Pacific Wireless 900 MHz antenna. The 220 is 84 inches long and the 900 is 96 inches long, both weighing a few pounds each. Can anyone suggest a way to mount the two side mounted antennas? I know I probably cannot engineer something that mounts the side mounted antennas a great distance from the Comet, but would like to get them up in the air and structural sound. Since this is a crankup tower, I am limited to mounting them on the top only.
BTW, the steel mast protrudes only a foot or so above the CL-33. I am using another pole (aluminum) inside the steel mast to extend the height of the overall mast length to minimize weight on top of the tower. I have used this method before on other towers and is an easy way to go higher w/o adding a bunch of weight on the tower top assuming the antennas on the aluminum pole are fairly light weight. The steel mast is 2 inches and the aluminum pipe is slightly smaller OD so that it fits nicely inside the steel mast. The aluminum pole is shimmed a bit so it does not rattle around inside the steel mast. Both masts are pinned.
This antenna diagram will hopefully come thru as to what I am talking about.
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Regards,
Roger W5RD
Murphy, Texas
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