How about a "vent " pipe bracket? You can mount these to pipe "A" to support pipe "B" as long as your not talking about an extreme wind load,or you can use two pair? Radio scrap did carry these the last time I checked.
N9ZAS
Good Point, but the masts (POLE A) that I want to support it to is only 1-1/4" diamter (so that kinda rules out the vent pipe mount unless their is one for 1-1/4 to 1 1/4.Weight bearing is not to much of issue, the antenna are about 5 lbs.
Ok,how about a 1/3/8" sleeve over the ouside diameter of the 11/4" mast with a couple bolts through it?
This way you would be able to tighten the bracket down on the outside of the sleeve?
Of course the best way would be to change out the mast to 1 1/2" mast.
N9ZAS.