# [TCML] output voltage for Tesla transformer

Godfrey Loudner ggreen at gwtc.net
Fri Nov 16 19:18:34 MST 2007

```I have no access to Drude's paper, so I don't know how Drude got the
values of his "magic" numbers that resulted in the voltage ratio
-(L2/L1)^(1/2) with a concurrent coupling coefficient of 0.6, as
reported in Reed's paper. Keeping only some of the "magic" conditions,
Reed simply does a little calculus to get another set of "magic" numbers
resulting in the voltage ratio -1.1802(L2/L1)^(1/2) with a coupling
coefficient of 0.545659 (well it's about 0.6 too). The coefficient 0.6
is only one part of the story. I imagine one can obtain many voltage
ratio formulas, keeping optimization in mind, as one makes different
assumptions about the variables involved. It is clear from Reed's paper
that Antonio did not say that 0.6 was the only possibility. Another
thing to remember is that Drude's paper is most probably an analysis of
lossless systems. Considering all the losses in a classic tesla coil,
why should one use the results of Reed's paper to attempt achieving an
18% gain in the voltage ratio? But I do think that those papers on
lossless systems are fun and instructive to study.

Godfrey Loudner

-----Original Message-----
From: tesla-bounces at pupman.com [mailto:tesla-bounces at pupman.com] On
Behalf Of nnanred1 at netzero.net
Sent: Friday, November 16, 2007 2:27 PM
To: tesla at pupman.com
Subject: [TCML] output voltage for Tesla transformer

hi,
antonio has contributed his answer to this problem by concluding that
the formula cited in Greater voltage gain for Tesla transformer
accelerators by J. L. Reed is only good for a coupling of 0.6. this is a
wrong.  following wrong conclusions just leads people into more
confusion and poor results.
if one uses a search engine to find the above RSI paper it will be found
that the expression is totally general.  one will find k in the
expression, the coupling coefficient, it can take on any value between
zero and one. even the dreaded 0.1 the expression is the governing
equation for the output voltage of the Tesla transformer.  the paper
continues on and finds a new setting to obtain an 18% increase in
voltage gain.  it really is a piece of original analytical work. the
tuning method is also original that is why it is published in RSI. if
one is interested in the "voltage equation" and the "frequency equation"
for Tesla's triple resonance transformer consult the RSI pubs of John
Randolph Reed with your search engine. by now.
_______________________________________________
Tesla mailing list
Tesla at www.pupman.com http://www.pupman.com/mailman/listinfo/tesla

```