Hey guys,

I have a question. First understand what I do not know about welders and welding would fill volumes and volumes.

I have a Miller VINTAGE welder running 220 from a house line. There is maybe a 50' extension cord from the meter to the machine.

I start to weld and I can get some good bacon sounds going but maybe 3-5 minutes into welding it seems like the voltage drops or something goes awry. It just seems like it's strength drops off.

Is there a name for this and is there a part inside I can change to try to fix it?