As has been suggested, go with 40 or even 50 feet of well guyed metal 
mast.

Then, search for a fiberglass stand-off arm to bolt to the top section 
of the mast.

You could actually use two of them either 90 degrees or 180 degrees 
apart, with one or more dipoles attached to each.

Somewhere, I remember seeing a listing for a 4 foot single fiberglass 
stand-off arm that mounted with a u bolt, and did not limit itself to 
being used on a tower.

You can also fabricate something that will work out of heavy PVC, 
using a T fitting at the center and a length of PVC to slip over the 
top of the mast. If you do that, put a large wooden dowel rod inside 
each horizontal part of the arm for added strength, to prevent the 
type of thing that happened with your vertical section. Be sure to 
give that wood a thorough coating of outdoor spar varnish or some kind 
of water proof protection before inserting it into the PVC. Otherwise, 
it will rot with amazing quickness.





Mike Duke, K5XU
American Council of Blind Radio Amateurs