Re: More rotary gap questions...(materials)
Re: More rotary gap questions...
Mon, 14 Apr 1997 19:12:54 -0400 (EDT)
richard hull <rhull-at-richmond.infi-dot-net>
Tesla List <tesla-at-pupman-dot-com>
>These 'flaming power arcs' that I've heard so much about would probably
>destroy just about anything in short order, correct ?
>I'm thinking about useing the 'brass screw/acorn nut' method, since it
>seems so easy to make/repair/balance...
>Does anything in the collective wisdom suggest a better solution ?
The term flaming doesn't denote heat. It is a "condition",... a bad
gap that flames might even be cooler than one that doesn't!
The electrode material depends on the input power and the sort of gap
are planned to construct. Brass zinc and copper are OK up to about 1KW
common amateur construction. In careful construction, copper can be
5KW by a well versed amateur. Most, however, move on to tungsten,
of its poor working characteristics. I have found elemental niobium,
molybdenum, and tantalum to work OK at moderate powers with niobium
real winner in the machinability catagory.
Richard Hull, TCBOR