| 
Since he said the elements were held together with screws I suspect that 
the problem is actually the hole deformation anyway.  Screws push 
material from one tube into the other tube, making a kind of pseudo 
rivet that remains even after the screw is removed.  Drilling out the 
hole might work. 
73,
Dave  AB7E
On 3/11/2020 5:37 AM, john@kk9a.com wrote:
 Since aluminum tubing is thin and it has very high thermal 
conductivity I question how effective this method is.
John KK9A
Tom Hellem K0SN
Ignacy-
Try heating the larger diameter tubing portion close to the joint 
while simultaneously cooling the smaller diameter portion which is 
telescoped inside of it. 
Tom H
K0SN
 
On Mar 6, 2020, at 5:48 AM, Ignacy Misztal <no9e at arrl.net> wrote:
I bought a 40m old beam that needs to be dismantled. With screws out the
elements do not move. Any idea what to do?
Ignacy, NO9E
 
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