OK, enough,
If you don't want any kinks in it. You should slowly fill the tube with DRY
sand and tap it until it it is packed full THEN proceed with the bending. IF
you have packed the sand tightly the bend will resist kinking. I have used
this for bending tubing over a pulley with good results. The pulley for the
bend radius you need should to be progressive from large to final. For me it
took three sizes to get to the final radius without kinks. Works with aluminum
and copper. Does not work on conduit.
Mel, K6KBE
From: P.J.Hicks <[email protected]>
To: ELECRAFT <[email protected]>
Sent: Tuesday, October 4, 2016 3:33 PM
Subject: [Elecraft] Mag loop bender
Bending tube for Mag loop.
Simplest way is to get a piece of plywood about 3' to 4' square. Cut an arch of
18" in a 2" x 6" or 2" x 8" and nail it to the plywood. Next cut an another
arch from plywood of about 19" or 19 1/2" and nail it to the other arch forming
a channel. Use the channel as a bending guide to slowly bring the tube into
shape.
PJH, N7PXY
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