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@xxxxxxxxxxxxxxxx To: tesla@xxxxxxxxxx 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 _______________________________________________ Tesla mailing list Tesla@xxxxxxxxxxxxxx http://www.pupman.com/mailman/listinfo/tesla_________________________________________________________________More immediate than e-mail? Get instant access with Windows Live Messenger. http://www.windowslive.com/messenger/overview.html?ocid=TXT_TAGLM_WL_Refresh_instantaccess_042008_______________________________________________Tesla mailing list Tesla@xxxxxxxxxxxxxx http://www.pupman.com/mailman/listinfo/tesla_______________________________________________ Tesla mailing list Tesla@xxxxxxxxxxxxxx http://www.pupman.com/mailman/listinfo/tesla_______________________________________________ Tesla mailing list Tesla@xxxxxxxxxxxxxx http://www.pupman.com/mailman/listinfo/tesla
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