Rather than doing that, I'd stay with the tri-pod, but reinforce it... Use 3/8" (or heavier) threaded rod to go through the roof deck itself, and extend down enough to go through a 2x4 which is placed across several roof rafters. The 2x4 will cause any strain on the tower to be distributed across several roof rafters rather than at a single point. Do this for all legs of the tower.
I used a quad beam antenna and rotor mounted on a three-leg tower on the roof of my dad's garage 30+ years ago - back in my 11-meter days - and I never lost the antenna or tower due to high winds. I drilled through the single rafter that the one leg mounted above to allow for the cross-beam. The other two legs fell between rafters... Mark - N9WYS -----Original Message----- From: [email protected] On Behalf Of Preston Moore Anyone have any suggestions on an antenna for GMRS repeater use. This repeater will be at my residence and the antenna will be mounted on a 5-foot tripod on the roof. I have a DB-420 and was successful in getting it mounted, but I felt it was just slightly too heavy. I was afraid it would come down in a strong wind. Can I use just the top section of the DB-420 without changing the phasing harness? If not, can someone please suggest a decent antenna? Antenna tripod mount is at about the 40-foot level and height really does not matter. I have a $500 antenna budget. Thanks Preston Moore
