Re: Old dog learns new trick...Welding!
I just went back and looked at the picture of your Hobart machine. Typically the connections for the gas are on the front. I don't see anywhere on yours for a gas fitting. Unless it has been moved to the back of the unit, it might be that it is not set up for sheilding gas. Some machines aren't. If that's the case you're stuck with using flux core wire.
Welders that can use gas have line fittings and an internal solinoid for starting and stopping the flow of gas. Also on the Hobart there is a 'Purge' position on the range selector rotary knob. I don't see that on yours.
Age and Treachery Will Always Triumph
Over Youth and Skill & "Charlie Don't Ride"