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				New laser tube arcing at negative end in side tube, like
				Posted: Mon Sep 21, 2020
				by John Mac
				Got a mcw laser tube 60-80w 15 percent power fitted it and it is arcing at the negative end of tube, inside tube is this normal
			 
			
					
				Re: New laser tube arcing at negative end in side tube, like
				Posted: Mon Sep 21, 2020
				by Frank Small
				John
I have the same machine which I just fitted with a 75W tube.    Any chance you could post a picture when this happens?
Frank
			 
			
					
				Re: New laser tube arcing at negative end in side tube, like
				Posted: Tue Sep 22, 2020
				by John Mac
				I’ve took a short video of it, won’t let me post it
			 
			
					
				Re: New laser tube arcing at negative end in side tube, like
				Posted: Sun Sep 27, 2020
				by John Mac
				it seems to be a natural occurrence tube working well MCW 60 80w running at 82 watts at 24mA,