RE: The PING Test

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

Original poster: "Malcolm Watts by way of Terry Fritz <twftesla-at-qwest-dot-net>" <m.j.watts-at-massey.ac.nz>

Hello John,

On 27 Sep 2002, at 12:37, Tesla list wrote:

> Original poster: "John H. Couture by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <couturejh-at-mgte-dot-com>
> 
> 
> Antonio -
> 
> I agree with what you say about the continuous-wave, sinusoidal
> steady-state, conditions regarding the Q factor. However, the Q factor is a
> pure number derived from a dimensionless ratio (wL/R) that can also be
> applied to any TC secondary coil. John Freau says tests have shown that when
> the secondary coil turns are increased the sec voltage increases without any
> other changes in the TC system except to retune by changing the pri coil
> taps. John, can you give us more details? This indicates the Q factor has
> been increased. The two equations involved are
> 
>     Q = 6.283 F L/R
>     Vs = Q Vp Eff
> 
> The tests indicate that according to the first equation the (F L) has
> increased more than the R has increased giving a larger Q factor. The tests
> also indicate that according to the second equation the secondary voltage
> has increased because the Q factor increased or because the Eff increased or
> both. Maybe it should be called a performance factor rather than a Q factor.
> I believe the next tests for this TC would be to test for the new Q factor
> (Ping Test) and the new efficiency (Lamp Test) to determine how much these
> two parameters have changed compared to the original values.
> 
> It is interesting that the TC sec voltage and spark length are being
> increased without changing the input wattage or the pri capacitor. This can
> only mean an increase of energy in the sec coil and an increase in the
> overall efficiency of the TC system.

Actually, what it really means is that the primary losses have gone 
down thanks to lower gap currents. You can clearly see the effects of 
both changes if you check the Q's of each circuit separately. Changes 
in the primary are far greater than changes in the secondary.

Regards,
Malcolm
 
> Do you or any other coiler see any problems with this reasoning?
> For the present you can ignore the streamer loading as this can be addressed
> later.
> 
> John Couture
> 
> ------------------------
> 
> 
> -----Original Message-----
> From: Tesla list [mailto:tesla-at-pupman-dot-com]
> Sent: Wednesday, September 25, 2002 6:56 PM
> To: tesla-at-pupman-dot-com
> Subject: Re: The PING Test
> 
> 
> 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: "John H. Couture by way of Terry Fritz
> <twftesla-at-qwest-dot-net>" <couturejh-at-mgte-dot-com>
> >
> > Antonio -
> >
> -------------------  snip
> 
> All talk about Q affecting the -maximum- gain of a TC-like system is
> for continuous-wave, sinusoidal steady-state, conditions. Not for
> operation by capacitor discharge.
> 
> --------------------- snip
> 
> 
> Antonio Carlos M. de Queiroz
> 
> 
> 
> 
> 
> 
> 
>