Just be careful with heat on aluminum. Remember, a large part of the
strength of the alloys that are commonly used for antennas comes from the
heat treatment process. Heating too far could reduce the strength by up to
80%. See the basic info at
http://en.wikipedia.org/wiki/6061_aluminium_alloy and compare the annealed
(-O treatment) to the common -T6 that is used for antennas.
David Robbins K1TTT
AR-Cluster node: 145.69MHz or telnet://dxc.k1ttt.net
> -----Original Message-----
> From: jimlux [mailto:firstname.lastname@example.org]
> Sent: Sunday, March 14, 2010 21:38
> To: Tower and HF antenna construction topics.
> Subject: Re: [TowerTalk] Help separating aluminum tubes
> r young wrote:
> > I have, from an old antenna, where Penetrox was not used,
> am aluminum tube
> > stuck inside another slotted tube. It is frozen tight.
> > I sprayed some Liquid Wrench, but that probably doesn't go
> all the way down.
> > What is the best technique for separating stuck aluminum
> tubing without
> > breaking or twisting it?
> You can try heating with a torch to make the outer tube
> expand more than
> the inner tube.
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