Re: Marx using inductors (fwd)

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Original poster: Steven Roys <sroys@xxxxxxxxxx>



---------- Forwarded message ----------
Date: Fri, 16 Jun 2006 15:57:57 +0100
From: Mike Harrison <mike@xxxxxxxxxxxxxxx>
To: High Voltage list <hvlist@xxxxxxxxxx>
Subject: Re: Marx using inductors (fwd)

On Fri, 16 Jun 2006 07:40:05 -0600 (MDT), you wrote:

>Original poster: Steven Roys <sroys@xxxxxxxxxx>
>
>
>
>---------- Forwarded message ----------
>Date: Sat, 10 Jun 2006 07:49:14 -0700
>From: Jonathan Peakall <jpeakall@xxxxxxxxxxxx>
>To: High Voltage list <hvlist@xxxxxxxxxx>
>Subject: Marx using inductors
>
>Hi All,
>
>I am planning on finally getting around to building a decent Marx bank for
>demo use/ I have a bunch of nice TDK 40kV caps. Anyway, I want to use
>inductors instead of resistors, mostly for cost. I have looked around but
>can't seem to find much info on using inductors. I made a small Marx kludge
>a few years back with inductors, and it worked, but for this one I'd like to
>make sure I get all the spark I should. So, any suggestion as to wire size,
>inductance etc would be welcome. I am planning to make the frame out of 1/2
>to 3/4" PVC pipe, and the inductors would be wound on that.
>

2 issues I found during brief experients with inductors...
1) Remember how much voltage it needs to stand off - Tesla-coil style construction will be needed to
avoud breakdown
2) You will probably need some series resistance, as without it the inductors and caps can form
local tank circuits which can overvolt the caps - I had a lashup inductive MG with 25KV input throw
4" sparks across the caps...!