Blueish Glow in 2A3

oguinn · 1631

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Offline oguinn

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on: April 30, 2020, 04:13:17 AM
I have an ElectroHarmonix Gold 2A3 running in the Stereomour II. I noticed last night that there's a slight blue glow around the top on one tube. Is that tube going bad?

Jameson O'Guinn

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Main System: Schiit Bifrost MB, Rega Planar 6 with Exact cartridge, Eros 2, BeePre, Kaiju/Stereomour II, Jagers, Mainline

Desktop System: Crack with Speedball

Offline Paul Birkeland

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Reply #1 on: April 30, 2020, 04:45:44 AM
That's normal and a sign of a strong vacuum.

Paul "PB" Birkeland

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Offline Natural Sound

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Reply #2 on: April 30, 2020, 04:51:16 AM
I have some Sovtek 2A3's that have a blue glow. In my case it isn't an issue. Here is some more information.

https://blog.thetubestore.com/understanding-blue-glow-in-your-amp-tubes/


Offline oguinn

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Reply #3 on: April 30, 2020, 05:13:21 AM
Hell yeah, strong vacuum.

Thanks guys.

Jameson O'Guinn

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Main System: Schiit Bifrost MB, Rega Planar 6 with Exact cartridge, Eros 2, BeePre, Kaiju/Stereomour II, Jagers, Mainline

Desktop System: Crack with Speedball

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