I bought an old BOC Transtig 375 ages ago, and for one reason or another I've never used it until today. Unfortunately it seems to have a problem where I have to have it set to max amps on AC to burn a 3.2mm rod on arc mode, never tried it on tig but the seller did tell me that it had some issue on tig mode but I cant remember the details now. On DC it will hardly even strike an arc, regardless of how high I set the amps. Ive attached a pic of the front to show the settings for anyone familiar with these machines. Any ideas?