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How to rise the secondary?



-----Original Message-----
From: John H. Couture <couturejh-at-worldnet.att-dot-net>
To: Tesla List <tesla-at-pupman-dot-com>
Date: Wednesday, July 01, 1998 9:29 PM
Subject: Re: How to rise the secondary?

  Ed -

  You build great coils so I am not going to tell you how to tune your
coils. However, a computer can tell you if the tuning equation
  LpCp = LsCs   is balanced. The tweeking can be done with taps on the
primary of a properly designed and tuned coil.

  Do your tests indicate that moving the secondary away from the primary
does not reduce the spark output compared with a tuned coil with a primary
that has enough clearance to prevent sparking between the pri and sec coils?

  Do you believe your coils are critically coupled and work best when the
"telltale signs of overcoupling disappear"? What are the telltale signs?

  I do not get my hands dirty now for several reasons. One of them is that
my efforts look terrible compared to your fine craftmanship.

    John Couture

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

At 11:01 PM 6/30/98 -0500, you wrote:
>
>----------
>From:  Edward J. Wingate [SMTP:ewing7-at-frontiernet-dot-net]
>Sent:  Tuesday, June 30, 1998 9:19 AM
>To:  Tesla List
>Cc:  stcole-at-deltanet-dot-com
>Subject:  Re: How to rise the secondary?
>
>Tesla List wrote:
>>
>> ----------
>> From:  John H. Couture [SMTP:couturejh-at-worldnet.att-dot-net]
>> Sent:  Sunday, June 28, 1998 12:23 PM
>> To:  Tesla List
>> Subject:  Re: How to rise the secondary?
>>
>>   Ed, All -
>>
>>   What are the advantages of raising the secondary? This will change the
>> coupling and tuning but that can be done by proper design of the primary.
Or
>> have you found other reasons for raising the secondary?
>>
>>   I would expect that moving the secondary away from the primary would
>> reduce the spark output.
>>
>>   John Couture
>>
>
>John,
>
>I >>ALWAYS<< deliberately build my coils so they are overcoupled from
>the start and then use spacers to raise the secondary in 1/4" increments
>until the telltale signs of overcoupling disappear. That way, I know
>that the coil is properly coupled for maximum performance! You can't
>fine tune a Tesla coil system on a computer. I want to SEE and FEEL what
>the REAL hardware is doing when I tune a coil and a computer program is
>NOT real hardware! One can tweek and tune with a computer program and be
>a keyboard coiler for as long as one likes, but there is no substitute
>for real capacitors, wire, transformers, spark gaps, etc. The real test
>is hands on building and tuning experience with real Tesla coils and
>equipment. You have to get your hands dirty John! Only then has the
>Tesla coiler come home.
>
>With dirty hands in N.Y.
>
>Ed Wingate
>
>
>
>