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RE: Spark gap erosion resistance
Original poster: "John H. Couture by way of Terry Fritz <twftesla-at-qwest-dot-net>" <couturejh-at-mgte-dot-com>
Are you sure you have two phase at home?
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Wednesday, January 02, 2002 6:00 PM
Subject: Spark gap erosion resistance
Original poster: "Terry Fritz" <twftesla-at-qwest-dot-net>
While testing my CW coil for Marc, I noticed that the "bullet" inserts he
sent me are extremely resistant to erosion. Here is a picture comparing
one to a 1/8 inch pure tungsten rod after running a big arc about the same
length of time.
The tungsten rod is well discolored and the tip was burning off. However,
the bullet is hardly discolored at all on the very tip! They should make a
wonderful high power spark gap tip.
These "bullets" are apparently used as tungsten carbide tip inserts for big
rock drilling bits.
This is something people that need super high power spark gaps should look
BTW - I am seeing about borrowing a 2500 watt power supply from work to do
higher power testing :-)) It's three phase but can run from my home's two
phase in a pinch... Maybe then I will get fire balls. If not, we have
some 200kW ones... ;o))