[TCML] 5" Sparks - Approx 35 watts input power: Tesla was correct!

[bartb]

Hi John,

Karl's report of 18.125" exceeds the formula by 1". So, small coils can 
do well. Wait, I'm assuming a small coil. Any specs on Karl's coil? The 
contest is about small power, not necessarily a small coil.
Bart

Lau, Gary wrote:
> Hi John,
>
> My minicoil contest rules and results are at http://www.laushaus.com/tesla/minicoilcontest/index.htm
>
> Using a partially deshunted 4/20 NST to yield 38mA Isc, Karl Lindheimer reports getting up to 18.125".  I once achieved 16", but haven't been able to do any better.  But the secret does appear to lie in going large with top load and pri/sec inductors.
>
> FWIW, my mini coil NST pulls 1.75Amps @120V from the wall with no PFC.  Not certain if this included the microwave oven fan for the spark gap, but that shouldn't account for much.
>
> Regards, Gary Lau
> MA, USA
>
>
>   
>> -----Original Message-----
>> From: tesla-bounces at pupman.com [mailto:tesla-bounces at pupman.com] On
>> Behalf Of FutureT at aol.com
>> Sent: Wednesday, March 12, 2008 10:12 PM
>> To: tesla at pupman.com
>> Subject: Re: [TCML] 5" Sparks - Approx 35 watts input power: Tesla was correct!
>>
>>
>> Bart, Gary,
>>
>> Well now that you mention that, do you happen to remember
>> what the results were for the best small coils in Gary's small coil  contest?
>> I don't remember if those coil's performances met my formula or not.
>> Maybe Gary can give some info here.
>>
>> When I built my TT-32 coil, it only gave 27" sparks instead of the
>> 32" I expected.  It was built very similar to the TT-42 coil, but was
>> smaller and used less power.  The results were below what my
>> formula would expect.  It's possible there were higher losses in
>> the particular transformer I used, or something similar.  I  didn't
>> really look into that.  Maybe it wasn't really missing the mark
>> by a full 5".  Maybe it only missed by 2" or so.  I've have to  check
>> my notes.  This happens to be one of the things which is clearly
>> annotated in my notes ( I think ).  The operating voltage was  lower,
>> and that may contribute to under-performance.  So yes,
>> there is hope for the small coils, that they may properly  obey the formula,
>> if they are built carefully enough.
>>
>> Cheers,
>> John
>>     
>
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