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Up Topic Welding Industry / General Welding Discussion / Airco Super Hornet 300 or Big 40 Rheostat Wiring
- - By brutustitan Date 12-20-2021 02:45
I picked up an Airco Super Hornet 300, serial # 72-627568.
The fine current rheostat was missing, so I installed the correct one, 300 watts 34 ohms.
I looked at the earliest Miller Big 40 owners manual and followed the wiring schematic, but it looks different.
I have three wires, one coming from the gen, and two from the wound resistor, that I believe go to the  3 poles on the rheostat.

Does anyone have the wiring details on this machine to the rheostat?
Parent - - By Lawrence (*****) Date 12-20-2021 15:44
These folks have had answers to EVERYTHING when it comes to vintage welding power supplies.

They can prolly shoot you a PDF or walk you through it.

https://www.billswelderrepair.com/
Parent - By brutustitan Date 12-21-2021 03:43
I'll check them out.
Up Topic Welding Industry / General Welding Discussion / Airco Super Hornet 300 or Big 40 Rheostat Wiring

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