Re: OLTC maggy

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

Original poster: "boris petkovic by way of Terry Fritz <teslalist-at-qwest-dot-net>" <petkovic7-at-yahoo-dot-com>


 >  > What is not observable in lumped analysis are
 > voltage
 >  > gradients on coils and local E-field stress.
 >
 > No important effects, except for the well known
 > distributed
 > capacitance in the third coil. If the voltage at the
 > top
 > of the second coil is significantly smaller than the
 > voltage at the top of the third, no other
 > distributed
 > capacitances would have significant effect.
---
For extra these effects in 1,2,3 mode are the great
and depend on coil geometry and geometry/size of
isotropic capacity object of its terminal.
For fast energy transfer for 2nd coil tight coupled to
primary ,current spikes (in Mhz+ spectrum) can
interfere too (stronger than in low coupled
system).This is an inherent property of every helical
resonator in transient operation.Paul Nicholson
might comment on this.
---



 >
 >  > Futhermore ,if someone designs primary in way to
 >  > have more turns ,in order to secure higher
 > primary
 >  > circuit impedance ,closely placed to 2nd coil
 >  > turns,than 3-coil system becomes even more
 > complicated
 >  > .Distributed C2' between L2 and L1 cannot be
 >  > considered pure capacity of second coil with
 > respect
 >  > to ground any more but is "blocked" by L1.This
 > results
 >  > in interferrence versus optimum energy transfer
 > to C3
 >  > (part of energy left somewhere else in
 >  > circuit).Fortunately ,OLTC primary with big cap
 > and
 >  > small L1 (1-2 turns) decrease that problem.
 >  > The effect certainly exist in ordinary built 2
 > coil
 >  > system but is too small to be important for
 > operation.
 >
 > Two things can happen: If the primary coil is
 > grounded,
 > its low impedance to ground and low voltage in
 > relation
 > to the voltage in the second coil causes it to
 > behave
 > as just ground, grounding its end of the L1-L2
 > capacitance.
---
Certainly,if low impedance primary is used this part
(C2') may successfuly be realised as part of total
C2,and no big problem.But,the question is how low with
respect to other parameters in magnifier system is low
enough to satisfy us for OLTC design with high
coupling?
---


 > If it is not grounded, the high voltage in the
 > secondary
 > coil may couple to the primary coil in common mode,
 > and
 > there is no significant L1-L2 capacitance
 > contributing
 > to C2.
 > Not a good thing to the circuits connected to the
 > primary...
---
Must be definitely grounded then.You are right.
---

 >
 > The exact required value for the C2 capacitance can
 > be
 > determined experimentally, with low-power tuning. A
 > significant part of it may be realized by the L2-L1
 > capacitance, and by the "lower end" capacitance of
 > L3.
---
Scoping and lower power tuning  is way to go for
everyone who seriosly attempts to mess with any TC
design.
To big istropic capacity in the bottom of extra coil
isn't best solution for higher powered resonator.
---


 > I imagine that streamer propagation occurs while the
 > energy is trapped in the resonator (in this case in
 > the L2-C2-L3-C3 system). I don't expect great
 > difference
 > in the apparent output.
---
In 1,2,n modes,when optimimum transferr occurrs ,if
toroid is smooth and roc choosen so that spark breaks
out at some 75% of max potential,the energy is
released in burst-almost explosively.Hull pointed out
that in his "maggy" systems with small 3rd
resonator,and dominant isotropic toroid sound was
something to hear,althought I doubt he had ever
achived (1,2,n)-like transfer or *true* mag operation
of any slower mode  .Therefore,I suspect something to
be different.
---


 >
 >  > Some famous 3-coil systems outthere are actually
 >  > somewhere in half way between true magnifier
 > operation
 >  > and 2-coil system showing immpressive
 > performance,even
 >  > with high BPS rate.Maybe this is way to
 > go,magnifier
 >  > wich is not optimised  .We don't know yet what is
 > the
 >  > best for spark growth in 3-coil system,neither
 > how in
 >  > reality high coupled system reacts to a sudden
 > release
 >  > of energy on C3.
 >
 > Some data about the effective coupling of these
 > coils
 > would be interesting. I guess that they are just
 > well
 > designed (maybe by luck, or by experience) two coils
 > system.
 > coils as a two coils system, using the same power
 > supply and the same resonator.
---
Some traces of 13M,can be viewed on www.ttr-dot-com
site,(in the end of 13M story article there are links
of msm).Not true magnifer judging by
waveform,althought drawn scheme clearly shows the
presence and recognising of C2 inthere.

regards,
Boris


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