Re: HV/HF without sparkgaps.

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: <davep@xxxxxxxx>


> My problem doesn't relete direct to TC but it has very in common.
>
> I'm building a circuit for HF HV arc starter for welding machine. It
> works on the same principle as the TC. HV powersupply, spark gaps,
> caps, and the output transformer. One difference is the output
> transformer. It has a very low turns count on the primary and the
> secondary. about 10 turns prim. and 15 turns sec.(There is a big
> current in the sec. winding because this winding is in series with  the
> torch.)   I built one: similar to this:
> http://www.geocities.com/CapeCanaveral/Hangar/6160/welder/arcstarter/hf.html
> or http://158.193.202.11/hw/welding/arc_starter/schem.pdf
> or http://thompdale.home.comcast.net/tig_controller/tig.htm
> All the same principle. Output transformer can have ferite core or
> not.(two concentric coils.)
>
> It works, but I would like to remove the sparkgaps if it is possible.
   The gaps are needed.
   The gaps are used in the professional welders I have
   examined.

   (The gaps allow the generation of HF, which 'jumps better' than
    DC.  The gaps are more rugged and cheap than alternates, like
    semiconductors.)
    best
     dwp