[TCML] Tank Capacitor

[Kurt Schraner]

There once was a time..., fully concur with Gary and Quarkster. Please see:

http://www.pupman.com/listarchives/2000/August/msg01085.html

...in order to have an overview. Apart from "experience and measurement" it 
can be mentioned, LTR was first a child of computer simulation, citing Terry 
from the above posting:

"Interestingly, these systems were born from computer modeling and 
optimization rather than actual trail and error testing."

Best regards,
Kurt

Lau, Gary wrote:
> There once was a time when it was believed that in order to extract
> the maximum power from an NST, the cap should be mains-resonant.
> Experience and measurement now shows this to be not true; a cap value
> that is larger than resonant is where the maximum power is drawn.
> And perhaps more importantly, there is a hazard with using a
> mains-resonant cap.  Should the spark gap be set too widely, the cap
> will charge to successively higher and higher voltage with each mains
> half-cycle if the gap does not fire, until something, typically the
> NST insulation, breaks down.  Choosing a LTR cap value lowers the
> degree to which the cap will ring up on successive half-cycles.
>
> There is NO situation where a mains-resonant cap is ideal.  Use a
> value between 1.5-2.0 times the mains-resonant value.
>
> A sync RSG needs to use a larger cap value than a static gap because
> the sync break rate (120BPS) is lower than a static gap typically
> fires at.  It is basically not possible to get consistent 120BPS
> operation with a static gap.  Nothing to do with Q.
>
> Regards, Gary Lau
> MA, USA
>
>> -----Original Message-----
>> From: tesla-bounces at pupman.com [mailto:tesla-bounces at pupman.com] On
>> Behalf Of Andrew Robinson
>> Sent: Monday, July 13, 2009 6:33 PM
>> To: tesla at pupman.com
>> Subject: [TCML] Tank Capacitor
>>
>> Whats the difference between the static gap LTR Cap and a resonant
>> cap? When do you use a resonant cap?
>>
>> Should we use the resonant cap (0.0066uF) or the LTR static gap cap
>> (0.0099uF) (12/30 NST on 60Hz)
>>
>> Why is there a different cap value for a SRSG. Is this because the
>> cap is designed to achieve max Q at the peak of each waveform
>> whereas with a static gap your going for max usable Q.
>
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