>In a message dated 6/1/2007 9:13:46 A.M. Pacific Daylight Time,
>km1h@jeremy.mv.com writes:
> At a former QTH with less wind exposure I had a 20/15/10 stack of W2PV
>4el monobanders on 20' of 2 3/8 OD galvanized cast pipe. Except for eating
>rotators (Daiwa and Create even using 2 thrust bearings) it survived just
>fine thru many northeasters, CAT 2 & 3 hurricanes and ice storms while on
>100' of 25G. Im sure that there are many parts of the country that cast pipe
>would fail
>but dont discount it altogether.
>In other words, you lucked out!
>
>Cheers,
>Steve K7LXC
>TOWER TECH
Also...if you are only planning on a single moderately-sized (i.e. not a 40m
full sized) antenna immediately above a thrust bearing, I don't see anything
wrong with using heavy-wall conduit for a mast.
I use heavy-wall conduit from Lowes for masts on both of my towers. One has a
Force 12 EF420/240, the other a 6 el 15m with 36' boom. Both are only an inch
or so above the thrust bearings, with nothing stacked above them (ok, there is
a TV antenna on one mast). Both have been through storms nearly up to our 70mph
county windspeed.
Torsten
N4OGW
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