• Airco 300 Amp Tig Welder
• Airco 300 Heliwelder V Manual
• Airco Heliwelder V Manual Typewriters

Thought weak HF was the problem.
I got the new caps for the HiFreq. installed...
Less spectacular improvements than I was hoping for.

• Airco Heliwelder V question. By Louie1961 » Thu Dec 11, 2014 1:03 am. Can anyone tell me if this is a rebadged Miller or Esab unit, and if I take the plunge on it.
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I am in need of some info regarding a welder I just purchased. It is an airco 250 ac/dc heliwelder v. It has the tig torch with it but not much else. Am looking for a manual for it also.

HiFreq is 'somewhat' stronger, but on Alu. it still does weird things.
It acts 'cold' even on high range.
There is not an abundance of cleaning action, and the puddle is sooty.

Airco 300 Amp Tig Welder

Makes no difference if I clean everything rabidly, or not.
Then there's the ever present weirdness where the puddle seems to 'vibrate'

Airco 300 Heliwelder V Manual

or hop up and down about .040 or so, plus the arc has that buzzing sound that
goes along with the vibrating. When it's doing that, it acts real cold, sooty and
hard to get the puddle to even get shiny.
3 things I suspect:
1.Torch is sucking air, or bad bottle of Argon.
2. My aluminum service wire is not delivering enough amps, or somehow primary
voltage is dropping off.
3. Internal problems.......other caps, or ????
Also weird that some days it will act quite hot with a smooth sounding arc,
then other days......what I described above.
I have an old air cooled Linde torch around someplace, I will try that just for chance.

Airco Heliwelder V Manual Typewriters

Any ideas what the problem could be?
Appreciate any ideas.