i put up an outdoor antenna on roof of my house. am pretty happy with overall. one small problem is reception breakup when windy, because got to much sway from antenna mast. someone direct me to good sturdy cheap mast about 15 feet. thanks in advance.
You can get a guy wire kit and stabilize it that way.
You can also use PVC or better yet Aluminum EMT pipe and make homemade stabilizer bars for the mast....further up.
Also, you can get thicker Galvanized Steel EMT pipe 1.25" to 1.5" Outside diameter to use as a mast, in place of what you have. It is probably thicker walled than what you have.
Furthermore, you can reduce the height of the mast to say 10 feet (with a 5 ft tripod, should be really stable). However with a 3 foot tripod, then 5 ft mast is much better.