[Prev][Next][Index][Thread]

Re: How should we measure coil efficiency, was neon vs. potenti




From: 	John H. Couture[SMTP:couturejh-at-worldnet.att-dot-net]
Sent: 	Friday, July 25, 1997 2:08 PM
To: 	Tesla List
Subject: 	Re: How should we measure coil efficiency, was neon vs.   potenti

At 08:22 AM 7/23/97 +0000, you wrote:
>
>From: 	Alfred A. Skrocki[SMTP:alfred.skrocki-at-cybernetworking-dot-com]
>Reply To: 	alfred.skrocki-at-cybernetworking-dot-com
>Sent: 	Monday, July 21, 1997 6:00 PM
>To: 	Tesla List
>Subject: 	Re: How should we measure coil efficiency, was neon vs.  potenti
>
----------------------------------------------

  Alfred -

  Where did you find that higher frequency gives shorter sparks?  I believe
it is the other way around.  The higher the frequency the longer the spark.

   Energy = hf    h = Planck's constant   f = freq.

   From the above equation the energy increases as the frequency increases,
other factors being equal. This would mean when the frequency increases the
spark length increases.
  
   But frequency is a minor factor. The major cause of air ionization is the
voltage and the higher voltages give longer sparks.

   As I have said in past posts, the quality and appearance of sparks is
subjective for Tesla coil ratings, so these ratings must be viewed from this
standpoint. Also, sparks cannot be converted to energy so they cannot be
used for findung the efficiency of a Tesla coil.

    John Couture

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

>On Monday, July 21, 1997 6:56 PM John H. Couture
>[SMTP:couturejh-at-worldnet.att-dot-net] wrote;
>
>>   I agree that engineering precision is limited when it comes to Tesla
>> coils. However, as I have said in the past why not set up a standard test
>> for the watts per foot of spark rating based from the engineering approach
>> instead of from some other method.
>
>John one problem with using a watts per foot of spark rating is that 
>the length of spark is also frequency dependant. The higher the 
>frequency the shorter the spark for the same given power level.
>There is also the problem of quality of spark ie. long thin spark as 
>aposed to shorter fatter spark, generaly higher voltage and 
>less current produces the long thin spark and the short fat sparks 
>are produced at a higher current and lower voltage. So now we have 
>three variables that all can change independant of the power input,
>we will have to nail down these variables before power has any 
>signifiant meaning in relation to spark length aside from the general 
>maxium of more power equals longer sparks.
>
>
> 
>                               Sincerely
>
>                                \\\|///
>                              \\  ~ ~  //
>                               (  -at- -at-  )
>                        -----o00o-(_)-o00o-----
>                           Alfred A. Skrocki
>                   alfred.skrocki-at-cybernetworking-dot-com
>                             .ooo0   0ooo.
>                        -----(   )---(   )-----
>                              \ (     ) /
>                               \_)   (_/
>
>
>
>