Hello all. New to the forum. Been welding for about 8 years but very few and far in between. I just got a new to me Miller Econotig for 280, I was Told the high frequency does not work. Has anybody else had this issue it seems that I have seen a few more forums where people had issues with their high frequency. I have an old Miller high frequency Box, if my Hi freq is not working could I run it in line. Also is there a good way to check if my high frequency is working I read somewhere that you can hold it next to your machine and touch it to something metal with a good ground. Thank you