Re: tungsten rods and run time

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: DRIEBEN@xxxxxxxxxxxxxxx 

Miles and Ken,

What is the diameter of the tungsten rods that
you are using and what kind of power levels are
you running? You both witnessed my Green Monster
in operation with its 15 kVA pole pig power
source and I was using 3/8" and 1/2" diameter
tungsten carbide drilling blanks for the flying
and stationary electrodes, respectively. I would
guess that if you are using anything much smaller
than this at these power levels, your gap elec-
trodes will indeed quickly reach incandecsence.

David Rieben

----- Original Message -----
From: Tesla list <tesla@xxxxxxxxxx>
Date: Thursday, May 4, 2006 9:38 pm
Subject: tungsten rods and run time
To: tesla@xxxxxxxxxx

> Original poster: "miles waldron" <mileswaldron@xxxxxxxxxxx>
>
> Here is a pic of my friends running coil; it is throwing 10 and 11
> foot arcs
> right now.
>
> http://www.gravitymagnet.com/kenmay/images/wn1.JPG
>
> We are having the following difficulty and ask your advise. The
> tungstenrods in the async rotary 6 point 4 pickup spark gap glow
> red hot after 25 to
> 30 seconds of use. Maybe less. The tungsten rods then
> disintegrate. This is
> bad. How can we improve run time? Do we need another gap? Do we
> need a
> different kind of gap? Do we need to quench this gap with an air
> compressor?
> Here is a link to a close up of the spark gap:
>
> http://gravitymagnet.com/kenmay/images/blueasync.jpg
>
> Thanks!
>
> Miles & Ken
> http://www.gravitymagnet.com
> http://www.kenscoil.com
>
>