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Re: Does Anyone Know What Produces the Brown Stains Inside Some Tubes Like the 845 (NT)?

I have some heavily used and abused tubes that have brown marks above the spacer openings for the support posts on the top of the glass. It seems that after several years of driving into clipping, tubes like 2a3's 6l6's and 6550's get this marking. At least that's what I've noticed on my party amps.


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  • Re: Does Anyone Know What Produces the Brown Stains Inside Some Tubes Like the 845 (NT)? - kyle 14:46:57 09/29/04 (0)


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