Ayush,
I normally round-off just the edges so that they are no longer a right-angle as this could overheat easier. Putting the rod in a drill and spinning against a running belt sander is the method I use.
https://www.flickr.com/photos/33962508@N03/11034589463/
Tungsten will ablate, but not as quick as other materials.
See here:
https://www.flickr.com/photos/33962508@N03/16794887172/
These below were originally rounded on the edges but soon need some more attention:
https://www.flickr.com/photos/33962508@N03/8584774251/
No personal experience with Aluminium, but I would imagine that with its low melting point it would be useless, maybe others have used it though?
Phil
-----Original Message-----
From: Tesla [mailto:tesla-bounces@xxxxxxxxxx] On Behalf Of Ayush Sharma
Sent: 17 April 2015 13:46
To: tesla@xxxxxxxxxx
Subject: [TCML] Spark Gap Doubts
Hey all
I have been working on a small size SGTC, and have posted a few doubts
regarding capacitors previously on the mailing list. I also have a few
doubts regarding the Spark Gap of my coil.
I am planning to use a Tungsten welding electrode (TIG) for the spark gap.
It comes in rods of dia 2.4mm and length 150mm. I am planning to cut the
rod into 4 pieces and use them for the spark gap.
I wanted to ask whether it is absolutely compulsory to smooth the edges of
the rod, and make them hemispherical at the end after i cut it into pieces,
or it will be ok to just use the flat sides in the spark gap.
Also, I wanted to ask if anybody has ever used Aluminium balls for making a
spark gap, and what are the pros/cons for the same?
Thanks
Ayush sharma
ᐧ
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