Re: DC Tesla Coil Questions (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Sat, 18 Aug 2007 19:03:34 -0500
From: Crispy <crispy@xxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: DC Tesla Coil Questions (fwd)

A. Without something to limit current, there will be a huge current
surge from the smoothing capacitor (or equivalent, with just a doubler).
This is bad for both the smoothing cap and *very* bad for the de-Qing
diode.
B. I'm not sure exactly where you can get them, but I know that I've
seen a web site somewhere that uses 4 iron-core amplifier reactors in
series to withstand the voltage.  A saltwater charging resistor should
be fairly easy to build.
C. I don't know for sure, but I'll take a guess and say that it depends
on the particular component.  What are you using SCRs for?

Chris

On Sat, 2007-08-18 at 16:20 -0600, Tesla list wrote:
> ---------- Forwarded message ----------
> Date: Sat, 18 Aug 2007 20:40:21 +1000
> From: T476202 A. Wang 2007 <tangara_02@xxxxxxxxxxx>
> To: tesla@xxxxxxxxxx
> Subject: DC Tesla Coil Questions
> 
> Hi,
> 
> Iv'e decided to start on a DC coil project for my 2nd coil. Does anyone have 
> any ideas? Im using 2 MOTs in series, and a standard doubler. I have a 
> Maxwell 35kV 0.03uF capacitor, and using a 3000-3600rpm ARSG. So here are 
> the questions:
> 
> A: What happens if you leave the charging reactor or the charging resistor 
> out, and put the D-Qing diode in its place?
> 
> B: Is there some form of commercially available charging reactor/choke 
> because I dont have the time to make my own.
> 
> C: With SCRs/thyristors, does a positive or negative charge need to be 
> applied to the gate to turn it on, or any charge?
> 
> Thanks in advance for the help. Ill post up some pictures once Im done with 
> this coil.
> 
> P.S. NSTs die a bit too quickly. They dont like ARSGs much at all...
> 
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