RE: 2 stage TC possible? (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Tue, 25 Sep 2007 09:58:16 -0400
From: "Lau, Gary" <Gary.Lau@xxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: RE: 2 stage TC possible? (fwd)

Well I'll be dipped...  I was initially going to reply that attempting
to drive a 2nd-stage tank circuit from a 1st-stage secondary can't
possibly work, but it appears that's just what Marconi did.  Can anyone
explain to me the rough parameters are of this scheme?  First stage
frequency?  Second stage tank capacitance and frequency?  A second-stage
bang voltage of 150kV was suggested; that's got to have problems!  Does
the 2nd stage gap fire at the same rate as the 1st, or does the second
stage bang many times for each first stage bang?  Sure doesn't seem
efficient, what was the goal that a single stage failed to achieve?

Thanks, Gary Lau
MA, USA

> From: Marko Ruban <Marko@xxxxxxxx>
> To: Tesla list <tesla@xxxxxxxxxx>
> Subject: Re: 2 stage TC possible? (fwd)
> 
> Tesla list wrote:
> 
> ---------- Forwarded message ----------
> Date: Mon, 24 Sep 2007 13:04:38 -0300
> From: Antonio Carlos M. de Queiroz <acmdq@xxxxxxxxxx>
> To: Tesla list <tesla@xxxxxxxxxx>
> Subject: Re: 2 stage TC possible? (fwd)
> 
> From: David Rieben <drieben@xxxxxxxxxxx>
> To: Tesla list <tesla@xxxxxxxxxx>
> Cc: drieben@xxxxxxxxxxx
> Subject: Re: 2 stage TC possible? (fwd)
> 
> Marko, all,
> 
> Isn't that kind of the way a magnifier works?
> 
> 
> 
> No. A magnifier can be seen as a simple resonator (the third coil)
> driven from a Tesla coil. A cascade of two Tesla coils would have two
> spark gaps, or equivalent.
> You can build a low-frequency Tesla coil, excited from a large
capacitor
> charged from the power line and connected to a cored Tesla transformer
> by a mechanical or electronic switch (or a spark gap), and use its
> output to charge the primary capacitor of a conventional
high-frequency
> Tesla coil. The secondary capacitance of the first transformer would
be
> the primary capacitance of the second transformer. It seems more
> practical to use an induction coil instead of a Tesla coil in the
first
> stage.
> Marconi used a double Tesla coil system to power his transmitter in
the
> first radio transmission across the Atlantic in 1901. Look for the
> schematic diagram here:
> http://ewh.ieee.org/reg/7/millennium/radio/radio_differences.html
> http://www.cqham.ru/image/trx_marconi.gif
> 
> Antonio Carlos M. de Queiroz
> 
> 
> 
> 
> 
> What was the reason for using the last stage Tesla transformer in
> Marconi's setup?  Tuning into specific transmission radio frequency,
or
> just plain amplification?
> 
> 
>