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Thank you for your reply. I just needed to confirm the wiring before I power the unit up. The picture shows what you have said. This must have been a mistake at the factory during production or it...

I have a old Airco 300 Heliwelder IV machine. I have just ordered a new reactor pwb for replacement and apprehensive to power the unit up. I need to know what color wires go to the 25 Amp bridge...

Hello,

I just came across this website and noticed you replied to another gentlemen regarding his welder. I have an old Airco 300 Heliwelder IV machine with a similar problem of no current...