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.
For most Aluminum welding tasks, You need alternating current. Yes it can be done on DCEN with pure helium. watch video on DCEN TIG welding aluminum here. Tig Welding Aluminum is pretty cool! First of all, not everyone who can Tig weld, can Tig weld aluminum. Its one of those things that really sets a welder apart .