Is this glow from tube normal?

Tubes Asylum

Questions about tubes and gear that glows. FAQ

I just took delivery of a brand new matched quad of Winged C 6550 tubes for use in my PrimaLuna Prologue 5.

I haven't tried swapping places of any of the tubes yet, but the one on the furthest left position in the amp has a much brighter glow from the internals than the rest. When you look right inside the grey part inside the glass of this one tube, you can see a bit of what looks like a light filament (apologies for not knowing the correct terms) glowing a bright yellow, which is what is causing the extra glow.

It sounds fine as far as I can tell, but I just wondered if this sort of difference is normal on tubes, and whether it is something that will disappear as they 'burn in', or whether it is something I should be concerned about?

Thanks for any advice.

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Topic - Is this glow from tube normal? - copydex 02:21:00 06/21/08 (3)

Yes, under some (many) circumstances - Frihed89 08:18:30 06/21/08 (0)

RE: Is this glow from tube normal? - Jim McShane 07:55:48 06/21/08 (1)

RE: Is this glow from tube normal? - copydex 08:29:47 06/21/08 (0)

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