Re: [TCML] Primary Coil Simulator for Safe Primary Circuit Experimentation

[Phillip Slawinski <pslawinski@xxxxxxxxx>]

Paul,

I've run my coils DRSSTC, and VTTC off the k-a-w several times with no
problems.  Your mileage may vary.

-Phillip

On Sun, Jul 25, 2010 at 21:56, Paul Brodie <pbbrodie@xxxxxxxxxxxxx> wrote:

> I would be scared to death to put a Kill-a-watt meter on the same circuit
> driving a Tesla Coil. I am pretty sure it would quickly go the way of garage
> door openers that are near running Tesla Coils!
> Paul
> Think Positive
>
> ----- Original Message ----- From: "Gary Lau" <glau1024@xxxxxxxxx>
> To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
> Sent: Sunday, July 25, 2010 10:11 PM
> Subject: Re: [TCML] Primary Coil Simulator for Safe Primary Circuit
> Experimentation
>
>
>
>  Hi Phillip,
>>
>> Thanks for your thoughts on this.
>>
>> I think a thermocouple would be better suited than an optical sensor,
>> because when using a static gap, there are surprisingly low frequency
>> variations in power.  This is evident if you've ever viewed the mains
>> current on an analog meter movement.  I think thermal equilibrium would be
>> achieved in a few tens of seconds, and this would smooth out the
>> variations
>> due to the static gap chaos.
>>
>> I worry about the accuracy of monitoring the input power.  When pushing
>> 140V
>> into the NST, I'd be concerned with core saturation giving misleading
>> results.  Does a Kill-a-watt meter not register saturation?  Doesn't
>> matter
>> though - I have a thermocouple meter and I don't have a Kill-a-watt meter!
>> With the bulbs, all the power going to the bulb is real processed power.
>>
>> Regards, Gary Lau
>> MA, USA
>>
>>
>>
>> On Sun, Jul 25, 2010 at 9:08 PM, Phillip Slawinski <pslawinski@xxxxxxxxx
>> >wrote:
>>
>>  On Sun, Jul 25, 2010 at 18:40, Gary Lau <glau1024@xxxxxxxxx> wrote:
>>>
>>> >
>>> > However, if you replace the primary with the dummy load, one can >
>>> quickly
>>> > change the cap size and nothing else, and gauge the amount of power
>>> > processed by the brightness of the lamps.  For a more quantitative
>>> result,
>>> > you can mount a thermocouple on the lamp and see with what capacitor >
>>> size
>>> > causes the lamps to get the hottest.  I believe that this would give a
>>> very
>>> > accurate determination of the optimum capacitor size.  I'll have to
>>> > resurrect my coil and try this!
>>> >
>>>
>>> Gary,
>>>
>>> I think a photo sensor of some type would be better suited to this.  The
>>> thermocouple would work, but it will not be able to react to changes very
>>> quickly, like adjusting the voltage on the variac.
>>>
>>> This makes me think, do we even care about what the bulbs are doing? Why
>>> not
>>> just measure the actual power coming from the wall? The power coming from
>>> the wall is proportional to the power going out of the NST.  Any increase
>>> on
>>> the output side will show up on the input side.  The Kill-a-watt would be
>>> perfect for this task, and provides those quantitative measurements you
>>> seek.
>>>
>>> -Phillip Slawinski
>>> _______________________________________________
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>>>
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>
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