Old Miller SRH 444 problems..

[SpencerC]

There is an old SRH 444 in the shop that runs VERY hot, even at lower settings. When the dial shows about 50amps on the LOW settings, it'll burn a 1/8 7018 like there is no tomorrow.. It also has a funny sound for the first few seconds after the arc is struck,almost like a high frequency start or something. Anyone have any experience with these?

[ventureline]

Probably a shorted diode, or failed rheostat.

I'd go with the failed rheostat if it was my guess. Might want to make sure your not in remote position without a remote.

Is the breaker on the left side popping? if so you have a failed control bridge rectifier, a $15 fix

[SpencerC]

No breakers popping and I'm not sure if it even has remote abilities. I'll have another look at it tomorrow or another day and see what I can find..