Looks like you need to get under the hood and do some experimentation. Maybe Jody will make a video on the subject one day.

Thank you for your replies, fellas.

Guy at Lincoln emailed me back with a PDF conversion of the photocopied operator manual. It’s a Lincoln AC-180-T. Document dated January 1959. The 8 electrode terminals are 20, 40, 60, 80, 100, 125, 150, and 180. The three “work” terminals are low, medium, and high allowing a little adjustment to th...

Demented wrote:Is there a rectifier bridge inside, or do the taps lead straight out?

Haven’t looked.

Contacted Lincoln via phone. E-mail sent with picture and waiting. The man I spoke with was very helpful and wants to see if he can help. He suggests that it could be AC/DC because of the number of taps but I wouldn’t know. We’ll see I suppose.

Pretty sure all buzzboxes were tapped for aprox. 40, 60, 75, 90, 105, 120, 165, 150 ,175, 200, 225, regardless of year or model. Understood... but those are 11 ranges. Since I have 3 work taps and 3 heat taps then it looks if there are 24 options as to what the end result will be at the electrode. ...

As it works, and if you are so inclined, it would make a nice restoration/refurb project. Case probably needs some metalwork and repairs, re-doing the wiring/electrics, undoing the 'hacks' that previous owners over it's looooooong life have made, etc. Of course it makes no sense from a value/commer...

My guess an old Lincoln. The copper in it is worth more than the machine. Yep. I cringed when my sister hauled a similar one, but with a dial, that was burned up to THE DUMP! I told her she threw away a bunch of money. Made me sick. Stoked that this one works well though. This post is an attempt to...

Sure does favor a Lincoln but I have no idea. Obviously copper wound because it’s HEAVY. Been burning 1/8” 6011’s with it so it works! It was in the barn when we bought our place so I’m glad it works. However, as you can see, there ain’t a mark on it making trial and error the only way to get the he...