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Re: [TowerTalk] Loosening Al tubing to Al Tubing

To: towertalk@contesting.com
Subject: Re: [TowerTalk] Loosening Al tubing to Al Tubing
From: Patrick Greenlee <patrick_g@windstream.net>
Date: Sun, 12 Jun 2016 07:49:09 -0500
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
Put some ice inside the smaller ID tube, cap the end and apply plenty of heat to the outer tube while trying to dislodge it. If available, dry ice is better. Many Walmart stores used to sell it. The trick is to heat the outer tube quickly after letting both be chilled by the ice. If the workpiece will fit in the freezer chill it there before adding the ice and heating the outer tube. The tubes are often hard to separate due to some corrosion but that corrosion will partially insulate the inner tube from the outer tube and helps keep the inner tube cool while you are heating the outer tube to expand it.

Patrick        NJ5G


On 6/12/2016 7:29 AM, StellarCAT wrote:
I have a few sections from a used yagi purchase that are like this - a few of them I managed to get apart with lots of effort using a screw driver in an existing hole and lots of pulling ... the rest just wouldn't budge. Heating I don't believe works - its near impossible to heat them independently - so they expand together... I tried WD-40, and the slippery stuff - can't remember its name but for this purpose - nothing worked. These pieces are now in my scrap pile replaced with new material from DXE.

Gary


-----Original Message----- From: Don W7WLL
Sent: Saturday, June 11, 2016 7:31 PM
To: Towertalk
Subject: [TowerTalk] Loosening Al tubing to Al Tubing

Want to restore a small inherited tribander for portable activity.

Have a couple of tube to tube joints that are not coming apart with ‘gentle persusian’. They been sitting in a coast air environment for a few years (maybe 10).

What recommendations here on TT of best solutions (s) to work into the joints.


Don W7WLL
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