ballast bobbin...again

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "by way of Terry Fritz <twftesla-at-uswest-dot-net>" <CTCDW-at-aol-dot-com>

Hey all!

I have a quick question. In my search for a suitable bobbin material, I am 
wondering how close the wire need to be from the core. I assume that right on 
the core is the best, but can I wind on PVC pipe and put the core inside? It 
is a straight core. I could actually get some more steel and completely pack 
the pvc inside so it would be a more or less round cross section.. any help 
would be appreciated! :)

THanks!

Chris W