Re: Backwards primary?

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

Original poster: "Jason by way of Terry Fritz <twftesla-at-qwest-dot-net>" <jasonp-at-btinternet-dot-com>

Adam,

> I was wondering, Would it help anything if you made a primary that,
instead of
> starting at the primary and going up, it went from the secondary down?
Not sure what you mean... do you mean a conical primary?

> Also, it is possible to wind your secondary
> and take out the pipe? What would be the pros of doing this?
Interesting point. It would be tricky, and the lack of epoxy / varnish /
whatever between the windings would lower the insulation of the wire
dramatically (remember in many cases the secondary has to take 1kV or more
between the turns!!). You would also have to use a seperate support for the
topload, and it would be very delicate. However, if you could somehow seal
the wire onto the form and then slide out the form, then the RF penetration
would be increased. As it is, most plastics such as PP have a very high RF
penetration, so it would make very little difference.

Best Regards,

Jason
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