ANY Ham grade antenna should never be installed in a commercial environment.
They are cheap for a reason. Go with a Decibel Products, Celwave, ASP or, Scala. The problem you get into with used antennas is that they are usually 450-460, 460-470 or, 450-470 The 450-460 will normally work down into the lower part of 70cm but they are hard to find. The 460-470 is a looser all the way around for ham use. Some of the 450-470 antennas will work for most of the band but may lose gain (and exhibit some down tilt) lower down the 70cm band. There was a lot of paging, Mobile telephones and, air to ground out there before (454.025 to 454.950) Paging died, cellular killed IMTS and, air to ground went to 900MHz. some of these antennas were ordered frequency specific and will work well. Also Radio stations use RPU (Remote PickUp) on 450 and 455 if you find one of the 450s you hit a home run. Antennas that I have used that work well. DB-410(old) or 420(newer) are exposed dipole arrays they and any antenna in that family (DB-408,DB413) Work good down to about 443.000 then they lose gain. ASP705K made by ASP works well to about 443.000 as well. Lower that that they lose gain and exhibit down tilt. PD-455 and most of the Phelps Dodge, Celwave or RFS antennas in the 450-460 versions works down to 441.000 or so. (PD-455-5 IS 440-450, PD455-6 id 450-460) PD-1151-2 HOME RUN this is a 440 to 450 antenna PD-1151-3 is a 450-460 and works about the same as the PD-455 Just test an antenna before you install it find a buddy at any paging company and get him(or her) to sweep it for you. That way you will know where it works and where it won't. Hope this is helpful. Robert / KD4PBC
