In a message dated 8/5/04 6:13:52 PM Eastern Daylight Time,
andersen@simnet.is writes:
Sanding down the crack sure makes it disappear, but at the same time
I would be thinning the wall of the tube a little in this place. Any
comments?
Depends what kind of crack it is. If it is from the stress by fatigue, it
would propagate, will get bigger and eventually fail. Fatigue crack is usually
caused by the vibration. In that case you need to remove "resonance" by guying
in different place or inserting dampening rope inside the element. It would
be advisable to put the brace around the area with crack. If possible use
aluminum welder and weld/fill the crack and area around it.
Sanding would help if the crack was just on the surface, but most likely it
would be across the thickness of the tubing, in which case is too late. Use
the brace or weld or use aluminum solder to fill it.
Yuri, K3BU.us
_www.computeradio.us_ (http://www.computeradio.us)
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