Re: TC Critical Coupling (was Overcoupling

• To: tesla-at-pupman-dot-com
• Subject: Re: TC Critical Coupling (was Overcoupling
• From: "John H. Couture" <COUTUREJH-at-worldnet.att-dot-net> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
• Date: Tue, 25 May 1999 06:45:43 -0600
• Approved: twftesla-at-uswest-dot-net
• Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme

  Greg -

  Were you able to find the overall efficiency of the Tesla coil system by
measuring the energy input and the energy output of the spark? 

  Has anyone else done this?

  John Couture

----------------------------------

At 08:21 PM 5/23/99 -0600, you wrote:
>Original Poster: Greg Leyh <lod-at-pacbell-dot-net> 
>
>>>> >How do *you* go about measuring the current and voltage associated 
>>>> >with the output spark?
>>>> 
>>>> --------------------------------
>>>> 
>>>>   You cannot. That is the reason that you have to find another method to
>>>> quantify the spark. The "controlled spark" is one possibility. This gives
>>>> you an input watts per foot of spark. This is an important variable for
>>>> Tesla coils. It is dependent on several other important variables in the
>>>> design of the coil and is, therefore, a good overall representation of the
>>>> coil.
>>>> 
>>>>    JC 
>>>
>>>To say "you cannot" is to deny that at least one person (Greg Leyh) 
>>>already has measured output currents. I concede.
>>>
>>>Malcolm
>>>
>>>
>> It was my understanding that Greg measured the current to the secondary
>>terminal not to the spark. I do not think these two currents would be the
>>same because they have differences in time.
>>
>>  John Couture
>
>
>>From the secondary terminal, I measured both the coil-to-terminal and
>the 
>terminal-to-spark current waveforms.  They are labeled so on the web
>page.
>-- 
>
>
>-GL
>www.lod-dot-org
>
>
>

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