Bottlehead Forum

Bottlehead Kits => Legacy Kit Products => Stereomour => Topic started by: altec604e on March 12, 2014, 09:10:23 AM

Title: NOS tubes on Stereomour glows differently
Post by: altec604e on March 12, 2014, 09:10:23 AM

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

Title: Re: NOS tubes on Stereomour glows differently
Post by: Doc B. on March 12, 2014, 09:13:43 AM

The blue glow is not a problem. Play away.

Title: Re: NOS tubes on Stereomour glows differently
Post by: altec604e on March 12, 2014, 09:16:53 AM

Cool !

Will put it on right away .

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

Thanks.

Title: Re: NOS tubes on Stereomour glows differently
Post by: Natural Sound on March 12, 2014, 10:00:35 AM

Quote from: altec604e on March 12, 2014, 09:16:53 AM

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 (http://www.thetubestore.com/Resources/Matching-and-other-tube-info/Blue-Glow)

Title: Re: NOS tubes on Stereomour glows differently
Post by: altec604e on March 12, 2014, 10:05:27 AM

Thank you so much !