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Primary field strength




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From:  Malcolm Watts [SMTP:MALCOLM-at-directorate.wnp.ac.nz]
Sent:  Sunday, August 23, 1998 4:33 PM
To:  Tesla List
Subject:  Re: Primary field strength

Hi Chris,

> From:  chris.swinson [SMTP:chris.swinson-at-zetnet.co.uk]
> Sent:  Friday, August 21, 1998 12:41 PM
> To:  Tesla List
> Subject:  Re: Primary field strength
> 
>  Hi, Malcolm
> 
> 
> <SNIP>
> 
> 
> it is derived from Conservation of Energy.
> 
>     0.5CpVp^2 = 0.5CsVs^2   where Vp = gap firing voltage
> 
> =>  Vp^2*Cp/Cs = Vs^2
> 
> =>  Vp*SQRT(Cp/Cs) = Vs
> 
> In other words, you can't get more out than you put in and that
> equality assumes no losses in transferring the energy from primary to
> secondary. Note that it also works by Vs = Vp*SQRT(Ls/Lp) since
> LsCs = LpCp (tuning requirement).
> 
> Malcolm
> 
> 
> Ok, But what about the resonance of the coil.  You get the first 50Hz pulse
> then, the next pulses are whole due to the EMF charging the capacitor up.
> Surly this is free energy ?
> 
> Chris.

Nothing is free in this world :)   Resonance allows the secondary to 
accumulate energy during the pri-sec transfer. It can't do more than 
that. Not sure what 50Hz has to do with this?

Malcolm