My Miller Dialarc/HF which is probably 25-30 years old stopped working. I had just started DC stick welding and something sounded funny. I stopped and the machine was making a noise like a transformer makes. In a few more seconds, it tripped the circuit breaker. I reset it after turning down the amp nob. Same noise but not as loud. It varied in intensity when I adjusted the amp control. It again tripped the circuit breaker. I reset the breaker, turned it to AC and immediately tripped the breaker when I turned it on.
Any ideas?