Jim Brown wrote:
> I asked a colleague who builds a lot of commercial two-way
> installations where I could find 2-inch hot-dipped galvanized mast
> material locally. He suggested that I use 1.5-inch rigid steel
> conduit.
There are two types of rigid steel conduit. The one is like schedule 40
pipe and the other (EMT) is thin wall.
The heavy conduit like we used in industry is soft like water pipe, but
still fairly strong. Then there is thin wall or EMT which would
probably work IF the antenna is mounted right at the top of the tower. I
would not want to mount the antenna any distance above the top of the
tower due to the leverage or angular moment generated particularly due
to wind load.
73
Roger (K8RI)
> I'll be using a 10 ft length with a 3-element SteppIR (no
> 30/40M element), with roughly 3 ft inside the top section of the
> tower. The tower is in a relatively protected location, so not a lot
> of wind speed.
>
> I would question whether this is sufficiently robust for a bigger
> antenna, but this is not a lot of load. Any thoughts on this?
>
> 73,
>
> Jim K9YC
>
>
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