Re: [TCML] DC tesla coil

[jhowson4@xxxxxxxxxxx]

Thanks for the reply's everybody , 

I have read through Richies site a few times and think I have a pretty good handle on how it is all supposed to work. But as I usually encounter, it is mostly based on theory and not a lot of actual construction practices. 

I definitely like the idea of the two gap system and essentially eliminating the need for a hefty inductor, Can you provide more information on such a gap. Are the electrodes spaced at 90 deg or are they within a few degrees of each other? 

I also do not have access to 3 phase power. I s a filter capacitor absolutely necessary? I don't think I could get my hands on a ton of microwave caps, and building my own, while not impossible seems daunting, apparently for a max power from the PT I need ~ 1.75uf, yikes! Any ideas? 

Thanks, 
John "Jay" Howson IV 

----- Original Message ----- 
From: "S&JY" <youngs@xxxxxxxxx> 
To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx> 
Sent: Wednesday, June 1, 2011 9:17:56 PM 
Subject: RE: [TCML] DC tesla coil 



-----Original Message----- 
From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf 
Of Jim Lux 
Sent: Wednesday, June 01, 2011 3:50 PM 
Jim - good question. I tried using two triggered spark gaps, but I couldn't 
find a way to keep them from firing at the same time--with disastrous 
results--even though the triggers were alternating with lots of dead time 
between the triggers. So I gave up & used the dual-gap RSG solution. 

And yes, for either configuration, filtering the DC power supply is a good 
idea. I used 24 Microwave oven caps in series-parallel to get the ripple 
down to less than 10%. 

Steve Y. 

To: tesla@xxxxxxxxxx 
Subject: Re: [TCML] DC tesla coil 

> 
> But if you want to build a much improved DC coil, add a second pair of 
> stationary electrodes on your RSG. One gap charges your MMC, the rotor 
> rotates a bit, then the other gap discharges the MMC into your coil 
primary, 
> and the cycle repeats. This avoids the RSG trailing arcs, allows break 
> rates as slow as you want, protects your DC supply since it is 
disconnected 
> when the MMC discharges into your primary, and allows you to use a simple 
> air core reactor of about 50 milliHenry. 
> 
> 

I wonder if you could make a triggered gap version of this? 
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