Are you trying to get me in trouble with the wife again? After 2 years, I finally got the verbal lashing the other day that I was anticipating long ago, for selling off the 251, and replacing it with the ESAB. Actually, my HH 187 is quite safe, I have no intention of selling it.
Yeah, you sent me the V/A curves on the 181, and it definitely suffered from the same issue that the HH 180 did, meaning to few taps for the out put range. Plus based on the other info you provided it seems like the 181 had inductance issues on the top end too just like the HH 180.
6 taps should help reduce the chance of a major hole in the output. Still though TA must have not been paying good attention, because my HH 187 is going to do a better job with its 7 voltage taps. Darrell did a great job on his redesign of the choke when Hobart went from the 180 to the 187, that has given the 187 very good arc characteristics and weld puddle wetout throughout the units entire output range. I find it interesting that TA uses the same "Enhanced Magnetics" wording that Hobart has been using since the release of the 187. For now I'll assume this possibly means they may have fixed their inductance issue too. definitely seems like TA is trying to catch up with Hobart in this amperage class.
MigMaster 250- Smooth arc with a good touch of softness to it. Good weld puddle wetout. Light spatter producer.
Ironman 230 - Soft arc with a touch of agressiveness to it. Very good weld puddle wet out. Light spatter producer.
MM 210-Looking for a new home locally
HH 125 EZ - impressive little fluxcore only unit