Copper is unlike ferrous metals that temper when cooled quickly
it goes soft _ water - cooling will allow it to become very workable
clean the surface prior to forming and have silver plated after
item has been formed
note to much heat and you then get into other problems such as Hydrogen
Embritlement
if you dip in water or air cool
I find it best to have a friend with a lathe do the forming with out
heating the tubing ...
as the tube will spring back somewhat the mandrill has to be a bit
undersize ....
73
de
ve6nap@rac.ca
----------
> From: Roy Koeppe <royanjoy@ncn.net>
> To: Amps Reflector <amps@contesting.com>
> Subject: [AMPS] Re: Tank coils
To: <amps@contesting.com>
> Date: Tuesday, January 18, 2000 4:06 PM
>
>
>
> "By the way, what is the easiest way to neatly wind a coil from 1/4"
> copper
> tubing to say 1 1/2' dia. I have heard that to heat it up first, then
> quickly cool it will soften it and make it easier to wind. What works
> good?"
>
>
> This procedure hardens and tempers metal, not soften it. To soften, you
> heat and then cool sloowly.
>
> 73, Roy K6XK
>
> P.S...Most copper tubing already comes annealed (softened as above) for
> easy working.
>
>
>
>
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