Plastic pipe for coil?

[bw]

Z Monkey, I saw you mention coils and overunity earlier.  I've never wound a coil but would be tempted to try the doughnut shaped Rodin Coil by Marko Rodin.  The coil even looks overunity.  Check it out @ http://www.markorodin.com/

[z.monkey]

Howdy Raykos,
Having a solder joint in the windings is a discontinuity in the inductor. This reduces the inductance.  So, add a few more windings to make up for it.  I am an ascended master of soldering.  Adding the heat shrink will add a little space between the windings, therefore a little less inductance in that tiny little spot.  No problem brother...

Howdy BW,
The "donut" shaped inductor is called a toroidal inductor.  It has it own inductive properties, see Wikipedia article on inductance.  Toroids make excellent inductors and transformers.  They, however, are a bitch to wind.  I have made several DC to DC converters and power filters using toroids.  The toroid is very efficient, but not overunity by itself.  I have been warned about the Rodin thing, it seems to be propriety to the military, so proceed with caution...
OK, have fun with that...

Blessed Be Brothers...