Re: tungsten rods and run time

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Barton B. Anderson" <bartb@xxxxxxxxxxxxxxxx>

Hi Miles & Ken,

Red hot suggest your pushing too much power through those electrodes. 
Either decrease the power or upgrade the electrodes. If their heating 
that fast, then your probably turning up the juice after it starts up 
to see just what the coil will do. From start up to "the juice your 
pleased with providing", there is probably a lot of time that goes 
by, all into heating up those electrodes. Upgrading to larger 
diameter electrodes would be a good place to start. Minimum 3/8" diameter.

I would also be curious if you have an idea of the break rate your 
running when this happens?

Take care,
Bart

Tesla list wrote:

> 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 tungsten
> rods 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