[TCML] Dry Ice

[bartb]

Hi Frank,

Yes, I've played with dry ice on a few occasions, just not on top of a 
coil. There will be no additional C with the water (well, about 0.1pF 
which is pretty much zero).

Take care,
Bart

Frank wrote:
> One thing you will find with dry ice is that it will freeze the water 
> around it and will slowly encase the dry ice in a normal ice block 
> shutting off the effect.
> You can slow this down by using hot water to start the effect. You 
> will have more fog at first doing it this way.
>
> Suggest you experiment with a metal and plastic bowl of water first to 
> determine which will minimize the additional capacitance to the top 
> load and give you the greatest spark.
>
> If you have not played with dry ice before, handle it with heavy 
> leather gloves, I found a good quality new, not oil stained, welder's 
> gloves work best, as tongs tend to slip and drop the ice just when you 
> do not want to!
>
> Frank
>
> At 05:56 PM 4/4/2008 -0700, you wrote:
>> Hi All,
>>
>> Thanks for all the tips. I learned a lot here. The fog rising (fog 
>> machine) or falling (dry ice) is interesting. Spillage of course is a 
>> concern, but easily controlled. The center bowl is stainless, but I 
>> would be wise to simply insert a plastic bowl. I won't be using my 
>> spun toroid but a smooth Al foil toroid, so no big deal there with 
>> pitting. What concerns me is temperature. July will be hot here 
>> (+100F). With dry ice, I expect the fog to roll down the outer 
>> portion of the toroid and head to the primary rather quickly (of 
>> course if there's a wind, then it's a no go). I'll have to do some 
>> test runs and see how this reacts outdoors.
>>
>> I'm not looking for any other effects expect a cloud and lightning 
>> show. This little coil puts out some hefty streamers (12/200 NST), so 
>> this could be an issue if the fog guides the sparks, although I do 
>> have the primary under acrylic, the bottom of the secondary would be 
>> a likely target. This might be one of those times that I may actually 
>> use some strike spheres or maybe even a ring. Come to think of it, I 
>> have a chrome 1.5" diameter tubing which may be perfect for this 
>> setup (the top ring to a clothes rack used at department stores, 
>> about 4 foot diameter). I simply need to gap it and mount it.
>>
>> Thanks for all the comments and experience in this area.
>>
>> Take care,
>> Bart
>>
>> Mark W. Stolz wrote:
>>> Hi Bart,
>>>
>>> Justin Hayes and myself did this a couple years back (2001) on his 
>>> and Aaron Koscho's 12" coil.  We had hopes of some change in color 
>>> or other effect, but it turned out to be exceptionally boring. :-)  
>>> On the plus side, it didn't create any issues either.
>>>
>>> Mark Stolz
>>> Pearland, TX
>>> http://teslacoils4christ.org/
>>>
>>>
>>>> Date: Thu, 3 Apr 2008 18:56:07 -0700
>>>> From: bartb at classictesla.com
>>>> To: tesla at pupman.com
>>>> CC: Subject: [TCML] Dry Ice
>>>>
>>>> Hi All,
>>>>
>>>> I was wondering if anyone has put dry ice (and water) up in the top 
>>>> load? I'm thinking about the 4th of July this year. On my small 
>>>> 4.5"D coil, my toroid uses to half spheres back to back as the 
>>>> center disc. It is a bowl and can hold a decent amount of liquid. I 
>>>> was thinking it might be kind of cool to throw in some water and 
>>>> dry ice to make some cool clouds (or fog) growing from the toroid 
>>>> (kind of a cloud and lightning thing). I figure someone here must 
>>>> have done this in the past as it's pretty simple to do, so I'm 
>>>> curious if those who have actually tried this ran into any problems?
>>>>
>>>> Take care,
>>>> Bart
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>>>>
>>>
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