[TCML] seriesing transformers - was: insulation

["David Rieben" <drieben@xxxxxxxxxxx>]

Doug, I'm not sure what you're trying to show with your
diagram, as I could not open it. However, as I said be-
fore, if the secondaries are mid-point grounded, then 
you simply cannot series the secondaries, unless you
could possibly hook the second NST to a high kv rated
isolation transformer, which would be quite impractical,
as the iso transformer would likely cost more than the
remaining system components, combined.
 
It's much more practical to just parallel NSTs of equal 
voltage to add their respective current ratings. You could
parallel (10) 15/30s for 15 kV at 300 mAs if you were so 
inclined, although it would be more practical and probably
cheaper to just upgrade to a PT or a pole pig at this level.
PTs and pole pigs are MUCH more robust and durable in
Tesla coil duty than NSTs, anyway. The down side of piggies
and PTs is that they require external ballasting, which does
add to the cost and weight of the power supply.

Also, NST manufacturers cut corners to keep the cost
of production to a bare minimum so even if the secondaries
were not mid-point grounded, their insulation would likely
fail if you started "piggy-backing" one in series with another.
OTOH, MOTs can be seriesed, up to a point, and I think that's
currently being discussed in the "mots in series" thread.


David Rieben

  ----- Original Message ----- 
  From: douglas smith 
  To: drieben@xxxxxxxxxxx 
  Sent: Saturday, June 21, 2008 10:20 AM


        your not  understanding what I'm doing   here's a diagram to give you a better idea

        of what i want to do

        2 coils on each side in series only one is  grounded the other not 

        makes one long secondary. kinda like putting batteries in flashlight.

        you should be able to do this because they have the same polarity cause they are on the same side

        but my real question is: what would be the benefit? one would be is you could put 3-4 of these in a small easily carried.  like empty ammo boxes from army/navy.

        what do you think?

        post or e-me either/both doesn't matter

                                              thanks Doug


       

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