very clever design . Our shop has probably the loudes compressor ever made it’s almost like running a top fuel engine in the shop you can clearly , loudly running even when table sawing big wood now on the other hand I have a California air compressor at home that you can barely hear running in the next room it’s actually two cylinder but only runs about 2/2 normal speed the intake is nearly silent using the air blower is far noisier Running air to a couple of my steam turbines creates higher db noise I YHINK it’s the high frequency whine that dominates the noise level I’d suggest some kind of baffled maybe with a foam or paper filter air intake
As i understand it, step-down transformers are not used in the modern TIG welders, it is all done electronically. That means there can be much greater control. I have a transformer type TIG welder in which one has to strike the arc like a match. It was one of the "new" ones made for small businesses back in 1980. I got it for a Lincoln 250 welder. The linconln is very nice, -- infinitely adjustable from 30 to 250 amps. But the TIG welder is COMPLETELY basic. I used it for a bit of practice then put it away as too difficult to use and control unless I absolutely HAD to use it which I never did need.
However, last year I bought a newer model, controlled and run by electronic methods.--that is, the new type of TIG machine. Many years ago, I learned to always check the % duty rating. IMNSHO, one should always try to get 100% duty rating so there need be no down time. If you are working professionally, this is a must. If hobby work, not necessarily a must. Also, this 100% refers to the higherst setting you can weld with. If you are welding at 200 amps, then your machine has a 40% duty cycle. If you are welding at a more likely setting of 40-120 amps, your duty cycle is longer, say something in the order of 60%.. If you are welding at 40 amps, your duty cycle is probably around 100%.
Another thing: since you are in the Land of the Thais, you are in a very hot country--that means the heat will not dissapate as rapidly as in a cooler environment which reduces your duty cycle. Keep a fan on your machine and that will help.
K2--Advertising? Yes, FALSE advertising! The Chinese have been known for centuries to give misrepresentations. However, it really is the same everywhere. In the US, false representation is often a illegal. But a rat can squeeze thru any hole in which it can get it's ratty litltle head thru, so any rat in business will keep chewing till it absolutely breaks the law. Unfortunately for the rats in business, they DO get a reputation, in this case, a "ratputation". -- HA, I just invented a new word, it will now have to be placed in the Oxford Dictionary. Will I be able to patent th word? How about a . . .