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Regular incandescent light bulb will act like a plasma ball and breakout point. Plastic handles will sometimes glow before catching on fire. I had a yellow handle file from harbor freight that would. A plastic dog water bottle or similar with and identical toroid on top will act like a cap and retain a small charge after turning off. A grounded strike target close to your max spark length will give you bright white arcs. If you have a plasma screen from a tv ( I fix tvs and usually have one laying around) you can charge it up like a plate capacitor ( works really good with a van DE graaf) . With a relay you can do like mine and have it where a separate nst starts a Jacobs ladder then switches to tesla coil once you key it ( I use Morse code paddle) letting go goes back to Jacobs ladder. I like a variac. Makes it more convenient to switch on and off vs unplugging. Also using the key can send Morse or play a tune if you have any rhythm on a spark gap coil. Any am radio or ham radio if have will break squelch like a regular lightening strike would so you can " hear" what your transmitting. Some sort of aluminum can electrostatic motor should turn to. John WT5Y Sent from my Samsung GALAXY S5™, a Cricket 4G LTE smartphone -------- Original message -------- From: Timothy Gilmore <tdg8934@xxxxxxxxx> Date:03/27/2015 14:37 (GMT-06:00) To: Futuret <futuret@xxxxxxx>, Tesla Coil Mailing List <tesla@xxxxxxxxxx> Cc: Subject: Re: [TCML] Mid sized Tesla Coil - Done I'm planning on having a showing of my mid sized Tesla Coil on Monday at my backyard for about 15+ co-workers that have shown interest in my mid size tesla coil project. Here are some of the things we will be experimenting with (3-4 foot sparks): https://www.youtube.com/channel/UCagcW23FY4yx6D4kWodMbKA Are there other things I can do with my coil? Tim On Tue, Mar 24, 2015 at 4:26 PM, Futuret via Tesla <tesla@xxxxxxxxxx> wrote: > Tim, The middle can be open. I used to use an X type central support > as you mentioned when I used ducting toroid. There is no rule for > thickness of center plates, etc. It doesn't matter. Just be sure > to connect the top of the secondary wire to the toroid or even > through the X type support to the toroid if the X support is metal. > > The toroid donut can be hollow (air filled inside), it makes no > difference. Usually they are hollow (much more lightweight). > > John > > > > > > > > -----Original Message----- > From: Timothy Gilmore <tdg8934@xxxxxxxxx> > To: mddeming <mddeming@xxxxxxx>; Tesla Coil Mailing List <tesla@xxxxxxxxxx > > > Sent: Tue, Mar 24, 2015 4:56 pm > Subject: Re: [TCML] Mid sized Tesla Coil - Done > > > Thanks all for your excellent input on top loads - Toroids. > > Does the middle > section have to be "filled in" with a metal object like a > pie pan? I thought I > saw a picture online that had an X or + shape middle > section to reach out to > the donut shape and hold it to the top of the > secondary. If it has to be filled > in with a metal surface like a pie pan, > is there any rule on how thick it should > be in the middle - or just enough > to hold the donut shape in place? > > Also I saw > online one design using filler material inside and outside of > the donut shape. > Should the donut not be hollow inside with air? > > Thanks - Tim > > > > > _______________________________________________ > Tesla mailing list > Tesla@xxxxxxxxxx > http://www.pupman.com/mailman/listinfo/tesla > _______________________________________________ Tesla mailing list Tesla@xxxxxxxxxx http://www.pupman.com/mailman/listinfo/tesla _______________________________________________ Tesla mailing list Tesla@xxxxxxxxxx http://www.pupman.com/mailman/listinfo/tesla