Re: Ultimate hi K for maggy

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

Original poster: "Antonio Carlos M. de Queiroz by way of Terry Fritz <twftesla-at-qwest-dot-net>" <acmq-at-compuland-dot-com.br>

Tesla list wrote:

 > Original poster: "Jolyon Vater Cox by way of Terry Fritz 
<twftesla-at-qwest-dot-net>" <jolyon-at-vatercox.freeserve.co.uk>
 >
 > Would it be possible to use an ungrounded PSU with a transformerless setup
 > if a balanced/unbalance network were used?

With two resonator coils, it's possible to keep everything balanced,
from the power supply to the output. The result is equivalent to a
"twin Tesla coil":

A balanced transformerless Tesla coil:

NST+ o-----+--C1--+---L2---(===) <-terminal, capacitance C2
            |      |
            o      |
gnd  o    gap    2L1-------o gnd
            o      |
            |      |
NST- o-----+--C1--+---L2---(===) <-terminal, capacitance C2

Better to ground the center of L1 for safety. This structure is very
simple and economical, but results in long energy transfer time, or
low voltage gain. The doubled capacitor may be just an MMC split in
two.

A balanced transformerless magnifier:

NST+ o-----+--C1--+---L2---+---L3---(===) term, capacitance C3
            |      |        |
            o      |        C2
gnd  o    gap    2L1-------+--------o gnd
            o      |        C2
            |      |        |
NST- o-----+--C1--+---L2---+---L3---(===) term, capacitance C3

The C2 capacitances are high voltage capacitors with small
capacitance, and can be made with flat plates, maybe under oil.
The doubling of L2 is an inconvenience, since it may be a quite
large inductor (~1 mH). This structure eliminates in great part
the compromise with energy transfer time x gain that is
characteristic of transformerless structures.

Formulas for the structures:
http://www.coe.ufrj.br/~acmq/mres4.html
http://www.coe.ufrj.br/~acmq/mres6.html

High-pass (capacitive transformer) and band-pass versions
are also possible.

Antonio Carlos M. de Queiroz