Re: Spark gap Rapid Wear

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Jason Johnson by way of Terry Fritz <twftesla-at-uswest-dot-net>" <hvjjohnson13-at-hotmail-dot-com>

I'm assuming that SS stands for stainless steel. You may want to change
this. I tried using stainless steel electrodes in my airblast static gap run
w/ MOTs. It looked like a fireworks show on the bottom deck of my tesla
coil! I use brass now which does erode somewhat quickly but there are no
pieces of hot metal shooting all over. I would try brass dome nuts first,
and if possible change the rotating electrodes to tungsten as well.

Jason Johnson

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Tuesday, March 13, 2001 1:54 PM
Subject: Re: Spark gap Rapid Wear


> Original poster: "tesla by way of Terry Fritz <twftesla-at-uswest-dot-net>"
<tesla-at-paradise-dot-net.nz>
>
> Team
> Fire up SRSG first time today, Went OK BUT rate of electrode wear is very
> surprising, looking for confirmation its usual or is something a littlle
> underrtted
> SPEC
> * Stationery 5mm Tungsten Rod, Clamped in Aluminium heatsink
> * Rotating electrodes connected on disk with SS ring
> * 200mm dia 6mm glass reinforeced fibreglass
> * Rotating electrodes 6mm SS Dome nuts (two off)
> * Power level was about 1.8kW (9kvc rms from 4 MOTS)
> * MMC of 90nF
>
> Ran for 2min total at low power and Tesla ran fine BUT sparkes of hot
metal
> (like a grinder) fly off the rotary. (Is this normal ??)
>
> SS Rotating electrodes very pitted and about 0.5mm of material removed
> Phase of SRSG is tested by stroboscope to be correct (That is on the bench
> checking gap closes when mains is at pk volts, possible phase shifts due
> inductive ballasting and capacitive loading of Tesla not verified however)
> Tnx
> Ted Linney in NZ
>
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