In Brazil, PAL is used in conjunction with the 525 line, 59.94 field/s system M, using (very nearly) the NTSC colour subcarrier frequency. Exact colour subcarrier frequency of PAL-M is 3.575611 MHz. Almost all other countries using system M use NTSC.n Brazil, PAL is used in conjunction with the 525 line, 59.94 field/s system M, using (very nearly) the NTSC colour subcarrier frequency. Exact colour subcarrier frequency of PAL-M is 3.575611 MHz. Almost all other countries using system M use NTSC.
Pure Tungsten (EWP) is typically used in welding aluminum. This provides the stable arc with AC welding and can be used with either Argon, Helium, or mix shielding gas. Pure Tungsten electrodes are marked by a green tip. Pure tungsten has the highest consumable rate of all the types, but they are cheaper too.
One advantage of using a stick/MIG machine with DC current to weld aluminum is that itâs fast, says Jim Harris, senior product manager for TIG equipment at Lincoln Electric. What you sacrifice is precision and appearance.luminum TIG requires gas shielding just like MIG (only 100-percent argon), a specialized tungsten-tipped torch, AC current and a foot pedal to vary the heat and current. The tungsten tips of TIG torches get very hot. Some use air cooling but TIG welding above 200 amps typically requires a water-cooled torch.