Hi:

I have a 220 and a 440 beam antenna mounted on a metal mast.  The 220 is 
doing a super job but the 440 is not.  Standing wave on each is fine.  Both 
are vertical.  They are not near any trees or buildings.  The 440 is on the 
top of the mast and the 220 is about 4 feet below it.  A friend said they 
may be too close to each other and that verticals should not be mounted on a 
metal mast as the mast becomes interactive with the driven element.  Both 
are end mounted, meanwhile, another says the mast is not the problem and 
that 1/4 wave length separation is sufficient.  I no longer have an antenna 
book and don't have the antenna assembly directions.  Any thoughts?

Thanks.
Bob Martin
KC3FI

EchoLink Node - 55127
Please visit http://www.wan-leatonks.net.