RE: 1/2" tungsten roundstock?

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

Original poster: "Colin Dancer by way of Terry Fritz <teslalist-at-qwest-dot-net>" <CMD-at-dataconnection-dot-com>

In terms of "brazing" tungsten to brass, a good qualify silver solder such
as EasyFlo and the appropriate flux is all it takes.  I generally drill a
flat bottomed hole of the appropriate size in the head of a brass bolt, cut
the rod to the right length, flux the hole, insert the tungsten and just
solder away using a blow lamp.  The only pain is that the flux can bubble up
and force out the tungsten, but this can be remedied by holding the whole
assemble together with an older pair of pliers.

Colin.

-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: 05 August 2003 14:57
To: tesla-at-pupman-dot-com
Subject: 1/2" tungsten roundstock?


Original poster: "by way of Terry Fritz <teslalist-at-qwest-dot-net>"
<Tesla729-at-cs-dot-com>

Hi all,

I am in the process of rebuilding my coil system and
have built a SRSG with G-10 and will be using tungsten
electrodes. I have been considering 1/4" tungsten elec-
trodes since that's the largest diametered size available
from a welders supply but I was wondering if I should
even consider 1/2" diameter tungsten since I plan on
running at about 10 kVA? If I should get that large
of dia. tungsten for electrodes, where would I aquire it
at this size? Would the 1/4" tungsten be large enough
for the relatively short runs that most coilers do?

Also, I have noticed some RSGs where tungsten tips
were somehow affixed to a stud of another type of
metal like brass, and I was wondering how tungsten is
brazed to another type of metal?

Thanks,
David Rieben