NOS tubes on Stereomour glows differently

[altec604e]

Hello,

I built my Stereomour amplifier some time ago.

My 2A3 RCA NOS tubes glows differently.

One of them has a much more brighter blue glow than the other one.

To my ears both channels sound the same, but I shut the amp down quite shortly after seeing this -  and I am now awaiting answer from you before turning it on again.


I`m new to tubes so I`m posting because I do not know if this is normal behavior on NOS tubes - or if somethings wrong....


All help will be appreciated

[Doc B.]

The blue glow is not a problem. Play away.

[altec604e]

Cool !

Will put it on right away .

Just out of curiosity : what is causing the difference in the brightness of the blue light ?

Thanks.

[Natural Sound]

Cool !

Will put it on right away .

Just out of curiosity : what is causing the difference in the brightness of the blue light ?

Thanks.

The following link explains what you are asking.
http://www.thetubestore.com/Resources/Matching-and-other-tube-info/Blue-Glow

[altec604e]

Thank you so much !