There seem to be some Chinese AC-DC welders starting at about $1000, but
that's not much less than the price of a Miller Diversion 165.
I don't understand why AC-DC welders are so much more expensive (and heavier)
than Dc-only machines. I was looking at the Diversion schematic, and the
AC capability is supplied by an electronic inverter switch between
the Dc power supply and the gun. The inverter is basically 4 big transistors
that alternately connect the positive and negative output to the gun
and work connections.
Doug
On Fri, Jan 7, 2011 at 6:57 PM, Mark Andy <marka@maracing.com> wrote:
> Howdy,
>
> On Fri, 7 Jan 2011, Douglas Braun wrote:
>>
>
>
> I don't have any info, but have a related question... The HF welder
> mentioned is DC only. Is there an AC/DC TIG choice available before you
get
> to the $1.5k+ name brand stuff?
>
> Mark
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