Forming a primary with k soft copper tubing

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Original poster: "Dr. Resonance" <resonance-at-jvlnet-dot-com> 



The part you missed was depth.  Just cutting a piece in half usually leaves
the tubing without enough attachment force so it tries to spring out.  Use a
ball nose cutter on a milling machine and then you can cut the depth to 0.80
x the copper tubing dia. (80% depth).

The wire is left in a coil and carefully "unwould" ahead and behind the main
so and it drops right into place.  Keeping the coil in a circular (original)
form as you slowly unwind it and press it into place in your holders.  Most
primaries are assembled in 10-15 min max. time but the slots have to be cut
deep enough --- 50% isn't enough.

Dr. Resonance

 > All advice and suggestions will be greatly appreciated.  I started out
 > trying to feed the tubing through the holes in my supports but quickly
 > found out that wouldn't work.  I then cut the support in half along the
 > centerline of the holes thinking this would ease the problem and that then
 > I could fasten the upper half back down to hold everything in place. This
 > isn't working either since you cant keep the individual turns in place
 > while you try and place the other turns.
 >
 > Thanks,
 >
 > Emmett Secrest
 >
 >
 >