View Full Version : Anyone ever heard of a L-tec 250 stk

11-13-2010, 02:59 PM
I have heard of and used an L-tec 250HF machine but I have run accross an L-tec 250 stk. It is labeled square wave but I can not tell if it is still HF (i doubt it). Just never heard of the stk version


12-09-2010, 12:53 AM
If it's a squarewave machine it would have to be HF. It's my understanding that you need the HF to maintain the arc in AC.

I just sold a L-Tec 250 HF. Great machine. Maxed out at something like 320 amps!