The directions just say to use a high enough setting for reliable arc starting - too high and it can cause interference with electronics.weldin mike 27 wrote:Why would one need to change hi freq intensity?
My Miller arc starter HF-15-1 has so much power it will throw an arc a foot long when cranked all the way up.
My Airco has to be cranked all the way up for reliable HF arc starting - but it is 50 years old