Re: [TCML] Thumper, the worlds most advanced tesla coil.

[Steve Ward <steve.ward@xxxxxxxxx>]

Well done, Finn.

Now, i am curious to see if the ideal tuning point changes much as you
approach full output power for this system.   I found with some of my coils
that i could achieve this idealistic looking primary current and good
performance, but with other coils the current would always "blow up" at the
end and id lose the notch, seemingly no matter how i tuned the thing, the
notch would not come back when at full power.  I suspect it has something to
do with the secondary Q dropping so much due to the streamers, but i havent
justified this in any formal way yet.

Steve

On Tue, Jun 8, 2010 at 3:39 PM, Antonio Carlos M. de Queiroz <
acmdq@xxxxxxxxxx> wrote:

> Finn Hammer wrote:
>
>>
>> http://www.youtube.com/watch?v=71hpP56JwGg
>>
>> It shows the primary current waveform, while we sweep the tapping point
>> from 1/2 turn too low, and up to the sweet spot, where the notches appear.
>> Notice that the current has dropped to half value by then, but the streamers
>> have developed from 10 cm to 1 metre. With the notch in view, we then reduce
>> the on-time till it coincides with the notch, and while this does not reduce
>> the streamer, it reduces power consumption.
>>
> A clear demonstration that this is the best way to drive a DRSSTC. Driving
> at the resonances just accumulates energy in the primary circuit, with
> inefficient transfer to the secondary.
>
>
>> Building this coil has beeen an unprecedented pleasure, so an abbreviation
>> to describe it would not suffice, an acronym had to be pinned on it:
>>
> Building a well-built machine is always a pleasure. Congratulations for the
> great work.
>
> Antonio Carlos M. de Queiroz
>
>
>
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