Date: Fri, 18 Feb 2011 16:45:55 +0000
From: Barry Gross <n1eu.barry@gmail.com>
Subject: Re: [TowerTalk] Force12 rivets
On Fri, Feb 18, 2011 at 3:53 PM, Mike Fatchett W0MU <w0mu@w0mu.com> wrote:
> What is the failure? An element tip?
>
>
Yes - one side of my 15M driven element is now the same length as 10M.
73, Barry N1EU
## OK... did the 3 x rivets shear off.... OR did the ele tip snap off due
to fatigue ???
## If the tip sheared off from fatigue...replace the 3/8" OD x .035" wall
tip...with
3/8" OD x .058" wall tips. The .058" wall tubing is a lot stronger than
the .035" wall stuff.
## Dunno why F-12 used .049" wall tubing for the rest of the ele's. waste
of time imo. .049"
makes a sloppy fit..and requires a slight swedge at each joint. The new F-12
designs use .058"
wall for everything..and no swedges anywhere. Then if internal doublers or
triplers used,
they just\slide right in, no fuss, no muss.....and no swedges.
later....... Jim VE7RF
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