I have one last question.

I an using a home made tilt over mast made up of aluminium scaffold tube (
2" OD heavy duty) and the same tube for the stub mast. I have two heavy duty
brackets made up that clamp onto the scaffold tube to hold the rotator and
support bearing in place.

What would be a good average distance to have between the brackets that hold
the rotator and bearing?

Thanks



"Ralph Mowery" wrote in message
...

"Barrett" wrote in message
.uk...
I have two beams I want to install on the same mast. They are, Cushcraft
MA5B and an 9 element crossed Tonna.

What is the optimal distance that these antennas should be spaced?

What is the minimum distance apart can they be mounted before they have a
negative effect on each other?

Does it matter what beam is mounted on the top?

Does it make any difference how close the beams are mounted to the
rotator?

This is the first time that I have put any beams up, so I thought I
better get some good advice first.

Thanks


I don't think there is any real optimal distance within what most can put
us. I tried to look at what was needed vers what I could put up about a
year ago. I did see the url Ian listed. My requirements was to have
about 15 feet of mast out the top of the tower that is 57 feet out of the
ground.. At the top went a M2 432 beam, about 4 feet below that went a M2
2 meter beam both beams were on a 15 foot boom, and close to 5 feet under
that went a 5 element 6 meter beam on a 18 foot boom. Just over the top
of the tower was a 3 element triband for 20,15,and 10 meters. All
antennas are horizontal. I am sure this is nowhere near optimal but just
the best for what I had to work with.