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Tubes in Blue

Some of the tubes on my machine show blue florescent neon color on their envelopes. Is there anything wrong with those tubes? Please provide your suggestion(s) and experience.

Thanks in advance.

Otto
yu11375

Showing 1 response by yu11375

yu11375 OP
137 posts
 
Dekay,

The tubes are in blue/purple glow are RCA 6SN7GTB (1 out of 6) and Sovtek 6AS7G (output, 3 out of 10) tubes on my Atma-Sphere amplifier. Also, the 6GC5 (rectifier, I believe) tubes on my preamplifier are the same. Any advice?

Thansk you all for your suggestions.

Happy Listening.

Otto
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