Re: magnifiers, bipolar coils, etc.

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

Original poster: "Joel Andersson" <andersson.joel-at-telia-dot-com> 


----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Sunday, January 18, 2004 2:42 AM
Subject: magnifiers, bipolar coils, etc.


 > Original poster: "Jim Lux" <jimlux-at-earthlink-dot-net>
 >
 > Has anyone ever built a magnifier with the driver primary/secondary
directly
 > under (and perhaps spaced) the tertiary (yes, it would look a lot like a
 >
 > Has anyone ever contemplated a bipolar magnifier?

Yes, I've had this idea in the back of my head for some time, I even made an
extra secondary for the small coil I built recently, so I have two 80*320mm
coils to use as tertiaries. But don't expect anything in the near future, so
many things to do, and so little time...

 > One could do it by hooking the primaries in series, but it might be better
 > to hook the secondaries in series.


I was thinking of a center-grounded secondary (located horizontally) and two
primaries in series to allow the coupling to be adjusted equally on the two
sides of the sec.

 > What about driving two tertiaries off the two ends of the secondary.  At
 > first glance, one might be able to consider the two tertiaries as being in
 > series (that is, the C3 would be half and the L3 would be twice.

So Fres is the same as a single tertiary?
But with the secondary center-grounded it's more like a twin than a bipolar,
isn't it?

And now we come to the math, I have never built a maggie and i'm completely
lost on how to do the calculations on one, should L3-C3 be tuned to the same
Frequecy as L2-C2,  wich in turn is tuned to L1-C1?

Definitely need to read up a bit on this...


 > You'd have the primary/secondary in between the two tertiaries.  It might
be
 > tricky to adjust the C2 (perhaps by fiddling with the transmission line,
or
 > by having the secondary sideways, and tipping one end or the other closer
to
 > the ground.
 >
 > (Antonio's site is down, or I'd be fooling with his design program at this
 > very minute)
 >
 > And, then, to return to a peculiar interest of mine, could one build a
 > primary/secondary for three phase (it might require a third winding on
each
 > of the three drivers to use for balancing the phases)?
 >

Regards,

Joel Andersson
Coiling in Sweden