Re: 3 Coil System Was: A photographic tutorial of Pancake Coil winding...with movies...(fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Sun, 24 Jun 2007 13:22:07 -0500
From: resonance <resonance@xxxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: 3 Coil System      Was: A photographic tutorial of Pancake Coil
    winding...with movies...(fwd)





David Sloan (Stanford) achieved 1,000,000 Volts at 1 mA output from a simple 
water cooled 1 inch dia copper pipe wound into a spiral with only 18 turns 
on sec.  The lower end was tapped at 2.2 turns and fed directly with a pair 
of 15 kV vacuum tubes in CW mode.  Power level was 150 kVA.  It was in a 
vacuum tank --- X-ray work for GE.  Resonant rise due to Q factor 
multiplication.

Dr. Resonance



> Hi Dave,
>
> Most magnifier systems are of the classic design with an L1:L2 driver
> situated a great distance from L3 and coupled via transmission line. L3
> is a standalone unit both in mutual inductance and the coil capacity
> itself with it's topload and ground. Those are completely different
> beast and follow different design rules which don't apply to this topic.
>
> Very few have built 3 coil systems of helical design as my hybrid maggy.
> A few of course have with flat coils, but I'd bet in nearly every case,
> it was similar to your coil in design where the solenoid resonance was
> determined by the L1 and L2 with L3 observed only as a capacity. Trying
> to get all three resonant through trial and error would be nearly
> impossible and a program would certainly be needed. Trial and error is
> very easy with a 2 coil system but not with a 3 coil system as we are
> discussing.
>
> You mentioned that anyone could replace the 3rd coil .... with a pipe of
> same dimensions and get the same results. That is true only if:
> 1) the 3rd coil is a close proximity coil as L1 and L2 are.
> 2) L1:L2:L3 are not designed to resonance.
> 3) L1 and L2 are resonant and L3 is seen as a capacity (which it is when
> 2 above is not true).
>
> But, if L1:L2:L3 "are" designed to resonance, the game changes,
> especially in a system with a flat secondary and helical solenoid.
>
> What would be really interesting is a high coupling 3 coil maggy in
> close proximity all using flat coils! Now that, we can model (unlike
> that cone topload object which is a real pain in the butt).
>
> Take care,
> Bart
>
> Tesla list wrote:
>
>>---------- Forwarded message ----------
>>Date: Fri, 22 Jun 2007 07:12:37 -0500
>>From: David Thomson <dwt@xxxxxxxxxxxx>
>>To: 'Tesla list' <tesla@xxxxxxxxxx>
>>Subject: RE: A photographic tutorial of Pancake Coil winding...with
>>    movies...(fwd)
>>
>>Hi Bart,
>>
>>
>>
>>>>Bart just pointed out that the metal pipe you are using acts like a
>>>>waveguide, or third coil.
>>>>
>>>>
>>
>>
>>
>>>Just the opposite. A third coil not in resonance acts more
>>>like a capacitively coupled topload object and the dimensions
>>>of the coil. The third coil is pretty much a pipe at that
>>>point. In Jeff's case, it's nothing more than a topload
>>>object. In your coil, the solenoid is acting like Jeff's pipe
>>>(just a topload object).
>>>
>>>
>>
>>It may be an opposite perspective, but it is the same thing, either way.
>>
>>A third coil has no inductive coupling with the secondary and acts like a
>>Helmholtz resonator.
>>
>>If my understanding is correct, anybody can replace the third coil on 
>>their
>>magnifier with a copper tube of the same dimensions and get the same
>>results.
>>
>>Dave
>>
>>
>>
>>
>>
>>
>>
>>
>
>
>