Re: [TCML] Silent Spark Gap

["Carl Noggle" <cn@xxxxx>]

Sealing tungsten electrodes in a glass tube would work, but you want the 
opposite of a noble gas.  Free electrons persist for a long time in a noble 
gas, which means very long arc length compared to air and would be very hard 
to quench.  Nitrogen works well.  You should have a means to change the gas 
periodically, since it will probably be slowly scavenged by the metal.  Heat 
removal is important too.

I've been using the same set of electrodes made from 85% tungsten and 15% 
copper for over 20 years with lots of usage on a 2kW coil and they show so 
little wear that they have never even had to be polished or sanded.  Brass 
works very well, but not that well.  The Cu-W alloys are easy to machine.

---Carl





-----Original Message----- 
From: Brandon Garretson
Sent: Thursday, June 06, 2013 8:04 AM
To: Tesla Coil Mailing List
Subject: Re: [TCML] Silent Spark Gap

What about sealing tungsten electrodes in a glass tube filled with Argon.
I thought I read about someone trying that once.


On Thu, Jun 6, 2013 at 1:13 AM, Amir Mojarradi <ln2guy42@xxxxxxx> wrote:

> Is there anyway to build an enclosure around the spark gap in a small SGTC
> in order to muffle the noise as much as possible?
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