1 tube glowing blue?

I just replaced the SED 6550 tubes in my VTL MB450s. In 1 amp there is a tube that is glowing blue. Is there something wrong with it? Dont want it to blow.

pal02-27-2007 1:54am

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pawlowski6132 Details Discussions Posts This discussion Message User 592 posts 02-27-2007 at 02:38pm Copy Comment URL Report Comment Edit Delete Should be OK. Results from certain gasses appearing in the tube (i.e., not complete vacuum)
rx8man Details Discussions Posts This discussion Message User 1,484 posts 02-27-2007 at 03:15pm Copy Comment URL Report Comment Edit Delete It's normal, I called SED a while back, they said not to worry. I have two quads of SED KT-88's, they all have a blue glow, plus they sound great.
justlisten Details Discussions Posts This discussion Message User 489 posts 02-27-2007 at 03:57pm Copy Comment URL Report Comment Edit Delete Pawlowski6132 is correct, Red bad. blue ok
newbee Details Discussions Posts This discussion Message User 4,793 posts 02-27-2007 at 04:25pm Copy Comment URL Report Comment Edit Delete There is a good explanation of the blue glow in a FAQ on the Audioasylum Forum. I recommend you read it. Blue glow is good, and pretty as well!
edle Details Discussions Posts This discussion Message User 235 posts 02-27-2007 at 04:47pm Copy Comment URL Report Comment Edit Delete I like Blue Glow.....It looks very beautiful when the lights off. I wish all my tubes glowing Blue :-) !!!!! Some of the Blue Glow that I have in my amp. are pulseing with the music !

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