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Winding coils of 1 1/2 inch ID should be fairly easy. I use the 1/4 inch
tubing normally used to run water lines to swamp coolers as it is fairly
soft and is easy to work with (I Have several coils of this size in the
garage I have wound). If 1 1/2inch ID is critical use a mandrel smaller
to compensate for coil expansion after winding tension is removed
(experiment). The tubing might tend to flatten slightly but that will
not hurt if the tubing is not kinked.
I close wind my coils and then use a piece of wood and run it between
the turns to get a uniform spacing. This way I do not need to be careful
in the winding process to try and get spacing while winding. Another
method is to pull on both ends of the coil carefully keeping windings
aligned lengthwise.
Home Base, Home Depot, Costco are places sure to have the coppor tubing
and I get it in a boxed quantity. The box helps protect the tubing from
shipping, storage and handling damaged until it gets to your home.
Hope this helps a bit.
73 de Arne N7KA
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<font face="Arial,Helvetica"><font size=-1>Winding coils of 1 1/2 inch
ID should be fairly easy. I use the 1/4 inch tubing normally used to run
water lines to swamp coolers as it is fairly soft and is easy to work with
(I Have several coils of this size in the garage I have wound). If 1 1/2inch
ID is critical use a mandrel smaller to compensate for coil expansion after
winding tension is removed (experiment). The tubing might tend to flatten
slightly but that will not hurt if the tubing is not kinked.</font></font><font
face="Arial,Helvetica"><font size=-1></font></font>
<p><font face="Arial,Helvetica"><font size=-1>I close wind my coils and
then use a piece of wood and run it between the turns to get a uniform
spacing. This way I do not need to be careful in the winding process to
try and get spacing while winding. Another method is to pull on both ends
of the coil carefully keeping windings aligned lengthwise.</font></font><font
face="Arial,Helvetica"><font size=-1></font></font>
<p><font face="Arial,Helvetica"><font size=-1>Home Base, Home Depot, Costco
are places sure to have the coppor tubing and I get it in a boxed
quantity. The box helps protect the tubing from shipping, storage and handling
damaged until it gets to your home.</font></font><font
face="Arial,Helvetica"><font size=-1></font></font>
<p><font face="Arial,Helvetica"><font size=-1>Hope this helps a
bit.</font></font><font face="Arial,Helvetica"><font size=-1></font></font>
<p><font face="Arial,Helvetica"><font size=-1>73 de Arne
N7KA</font></font></html>
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