[Prev][Next][Index][Thread]

Re: carbon gaps+N2

Tesla List wrote:
> 
> > Subject: carbon gaps
> 
> >From hb-at-earthlink-dot-netFri Sep 13 22:24:32 1996
> Date: Thu, 12 Sep 1996 22:12:04 -0700
> From: WILLIAM HENDERSON <hb-at-earthlink-dot-net>
> To: tesla-at-pupman-dot-com
> Subject: Re: carbon gaps+N2
> 
> Tesla List wrote:
> >
> > >From pierson-at-msd26.enet.dec-dot-comWed Sep 11 22:23:23 1996
> > Date: Wed, 11 Sep 96 10:05:29 EDT
> > From: pierson-at-msd26.enet.dec-dot-com
> > To: mail11:  ;
> > Cc: pierson-at-msd26.enet.dec-dot-com
> > Subject: carbon gaps
> >
> > >A carbon arc will restrike after power has been shut off for ~2
> > >seconds without having to touch the electrodes together again. This
> > >will foil any attempt to quench your spark gap.
> >
> > >I might be fun to see if a negative resistance oscillator could be set
> > >up using the carbon arc as an active element. Has any one tried this?
> >         Sure.  Much of early wireless used arc transmitters.  Work fine.
> >         (OK:  A tad noisy by modern standards.  8)>>)
> >
> >         One of the earliest 'true cw' transmitters.
> >
> >         These were separate/distinct from a spark (gap) transmitter.  ARC
> >         and SPARK are different critters.  The ARC transmitters were/are
> >         capable of voice broadcasting.
> >
> >         (Interesting thought, actually, use an ARC RF source as a 'driver'
> >         for a tesla secondary....  Needs a whole differnt PS technology:
> >         low volts, lots n lots a amps...)   My GUESS is that spark excitation
> >         is more 'efficient' for tesla-type work.
> >
> >         regards
> >         dwpHi
>   Try emersing your carbon gap in n2(nitrogen gas),this will stop the
> flaming of the gap.I use carbon arc rods used in "old" projector
> lamphouses,these rods are designed with copper centers to draw the heat
> away from the arc.These rods are designed for lots of current 200+ amps
> Use your n2 at low pressure,any questions just ask
> bill-- hb-at-earthlink-dot-net

Bill,

Moviehouse carbons used to have copper plated exteriors to improve
electrical conductivity. The centers I remember had some type of
chemical additive which permitted the arc to be more "white" in color
for better color balance during projection... has this changed in recent
years? 

-- Bert --