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Original poster: "Mr Gregory Peters by way of Terry Fritz <twftesla-at-qwest-dot-net>" <s371034-at-student.uq.edu.au>
After reading my post again, I realised that it may not have been
obvious what I was actually asking, so here goes:
I have noticed that most coilers use thoriated tungsten electrodes. I
would have thought that this actually would be bad for TC use, as you
want to keep the quench time down, and I would imagine that the extra
arc stability provided by the thorium would be detrimental to this
cause. Or is it more important to have a stable, reliably firing spark
gap? I don't know.
So I was basically asking if anyone has noticed any real difference in
performance with thoriated vs non-thoriated electrodes. I would imagine
that for our purposes, little, if any, difference would be observed.
As my coil eats thoriated tungsten for breakfast, I would rather use
plain tungsten electrodes if possible, negating any radiation hazards.
However, if arc stability is more important than quench time, I would
imagine that zirconiated tungsten electrodes would work better than
thoriated, as these are used for AC tig welding, whereas thoriated
electrodes are used for DC tig welding.
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