[Prev][Next][Index][Thread]

Re: Nested Secondaries

I have had thoughts along these lines but I've never had
the chance to actually try it.

The trick would be to make concentric coils with the same
inductance and native resonances. Not an easy thing to do!
Any differences in behavior along the length of the concentric
secondaries would lead to flash over between them.

But if you could do it with two then why not three and so  on?

If you start to think about what goes on in the flux field it
gets very messy.  A conductor subjected to a moving magnetic
field responds with a current flow that creates a magnetic field
in opposition to the initial field.  With two concentric coils
and a primary you get three fields acting on any coil in the
group.

I'm not sure it would be possible to get it to behave in a stable
fashion.  But that is just intuition.  Someone would have
to try it and do the observations to be sure.

Even if it failed it might be pretty spectacular for a little
while...

Just my two cents.

John




>Original Poster: Bunnykiller <bigfoo39-at-idt-dot-net>
>
>Hi All...
>
>
>	I was thinking about something that I havent heard any ideas about (
>maybe its too ludicrous). I searched the archives ans still nothing on
>it, so heres the idea.
>
>The concept is nested secondaries, one inside the other. My plans would
>consist of an 8 " dia tube with a 7" tube inside. Of course, both wound
>with 22Ga wire and both with the same amount of wire. Seeing that the 8"
>tube would hold more wire per length as the 7", the 8" form would have
>to be space wound for several inches ( havent done the exact math yet).
>Once both forms have been wound, the base of each secondary would be
>connected to each other ( and to RF grnd) while the upper leads would
>both be connected to the top load.
>
>Ok  heres the speculation ...   would this design allow for more power
>to be supplied to the top load ???  considering that we are dealing with
>EMF would the extra coil system use that emf and not subtract it from
>the outer coil ?
>
>some of the possible down falls that I see would be arcing between the
>secondaries BUT  ...   if they are the same ( electronically) why would
>they arc to each other ?   and what about the EMF produced by the
>secondaries themselves when the field collapses in them ?  ( not too
>bright on this subject , but trying ;)   )
>
>
>while im here    what is the avg. length of streamers produced by a
>10KVA polepig ?  Im getting  5-6'   is there hope for more length ?
>
>and one more     is there anyone out there that lives in La, New Orleans
>area ( or am I the only person in this city that loves coiling ;)  )
>
>
>Scot D