Re: DC Tesla Coil Questions (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Sun, 19 Aug 2007 14:52:01 +1000
From: T476202 A. Wang 2007 <tangara_02@xxxxxxxxxxx>
To: tesla@xxxxxxxxxx
Subject: Re: DC Tesla Coil Questions (fwd)

I've decided to use a few leftover MOTs for the charging reactor, but with 
an 8K tank circuit voltage, I aint have half a clue to what will become of 
my maxwell...

The SCRs are for the power control. I dont like contactors much, so im using 
two in inverse parallel. That way, they are sure to switch off.

BTW- the amplifier reactors used for the charging circuit are on 
www.scopeboy.com


>From: "Tesla list" <tesla@xxxxxxxxxx>
>To: tesla@xxxxxxxxxx
>Subject: Re: DC Tesla Coil Questions (fwd)
>Date: Sat, 18 Aug 2007 19:24:19 -0600 (MDT)
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>---------- 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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> >
> >
> >
>
>
>

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