Chuck Sherwood wrote:

how about a piece of tungsten??



well I have some tungsten rod for tig welding, but its much to
big. Can you buy tungsten wire or do I have to break a light bulb
to get some?



Break a "new" light bulb for the metal. The new tungsten is still
flexible and can be formed
but an old one will be brittle. Also you may want the metal to glass
seal that is hard to
make your self (I think).

Bill K7NOM