On 11/19/2011 2:25 PM, Ed Phillips wrote:
I've used wood a lot although your application probably requires it to be pretty thin. Before cutting the piece to be worked is placed in a pan full of melted paraffin was whose temperature is almost hot enough to scorch it. Air and probably steam bubbles out for a while but when that stops the wood seems to be pretty well impregnated and ready for use. The reason this is done before shaping is because the stuff usually shrinks significantly and can possibly warp. The wood is removed from the pan and suspended to allow the excess paraffin to drain off. After it cools is seems more solid and easier to work. This is a very very dangerous process because of the possibility of igniting the paraffin but I've never had any problems. Keep a fire extinguisher on hand 'just in case'. I should mention I've used this as a base for RF coils with no apparent increase in loss.Ed Hi, Scott,
I have some 2" diameter nylon rod--if you want a foot or so, I'll send it to you. Contact me off-list.
---Carl
Hey all, Still doing some research on making flyback transformers, I'm toying with the idea of making a slotted bobbin to make a series pancake type secondary, as it sound infinitely easier to wind, and I plan on makingseveral... My question is can I use wood as a bobbin material, it should be fairly easy to machine to my shape, and much cheaper than plastic, and I figure it can just be soaked in wax or polyurethane or epoxy or somethingto provide protection from the corona of the windings... Probably a badidea, but what do you guys think, using wood in a transformer, royally badidea or no? Scott Bogard. _______________________________________________ Tesla mailing list Tesla@xxxxxxxxxx http://www.pupman.com/mailman/listinfo/tesla_______________________________________________ Tesla mailing list Tesla@xxxxxxxxxx http://www.pupman.com/mailman/listinfo/tesla
_______________________________________________ Tesla mailing list Tesla@xxxxxxxxxx http://www.pupman.com/mailman/listinfo/tesla