my machine is a pp256. It goes from 10% to 90% ep. it looks like all the other 256s out there. when I get a few minutes I will try to strike an arc with a 1/16 or 3/32 and show you the result. I have a different reguator on my bottle... Dont remember what kind but I got it from praxair as well as all my electrodes. I have 1/16, 3/32, 1/8, and 5/32. all are 2% thorium except I also have some 2% ceriated in the 1/8. standard torch. I would persue the suspicion that my torch was malfunctioning but for how well it performs in dc. It is a water cooled torch, though. I have a makeshift cooler that I slapped together from a pressure vessel I made from the bottom 1/3 of a fifty gallon barrel. It is airtight so I just put my coolant in there and I have an air fitting with a regulator so I just dial in the pressure without the need for an expensive pump. Works great, the torch head doesnt overheat. If I use the 5/32 electorde it doesnt melt, but yes I do get some arc wander. I'm not unsatisfied, I would just like to learn how to take advantage of this unit's purported capabiities. will try to get soe more images in soon. btw, can I use my labscope to monitor the a/c frecuency and balance? I dont know enough about wlders to know how. i could use a fused input but I think te hf might still fry it.
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