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Re: Measuring k
From: John H. Couture[SMTP:couturejh-at-worldnet.att-dot-net]
Sent: Wednesday, September 17, 1997 11:19 PM
To: Tesla List
Subject: Re: Measuring k
At 10:27 PM 9/16/97 +0000, you wrote:
>
>From: Julian Green[SMTP:julian-at-kbss.bt.co.uk]
>Sent: Tuesday, September 16, 1997 12:04 PM
>To: tesla-at-pupman-dot-com
>Subject: Measuring k
>
>I don't have a inductance meter, but I do have a scope and
>I have recently been examining waveforms of my coil running
>under various conditions. (I hope to provide pictures of
>scope traces if anyone is interested).
>>From the scope trace I can see the point that the spark gap
>quenches and also determine k.
>
>Please correct me if I'm wrong:
>
>Spark gap quenches when the lobes finish and smooth decay
>envelope starts.
>
>k can be measured by counting the number of cycles to achieve
>maximum potential (on my coil this is 3 indicating a coupling
>of 0.33)
>
>Julian Green
>
>------------------------------------------------
Julian -
It is a simple matter to measure K by several methods after the TC is built.
The real challenge is to find the K of a Tesla coil at the design stage.
You can then design your coil to have the K you want.
The JHCTES computer program can find the K of a Tesla coil without having
to build and test it first. It is the only program available today that can
do this. Are there any programs I am not aware of that are available?
John Couture