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Re: HV/HF without sparkgaps.
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:
> or http://184.108.40.206/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
(The gaps allow the generation of HF, which 'jumps better' than
DC. The gaps are more rugged and cheap than alternates, like