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RE: 6B4G Single End amp in a new suit ?

Yeah, that can be an issue. The classic RCA 2A3s are pretty tough (and/or conservatively rated), and many people now use the modern mini-300B single plate ones which are often quite happy at 20+ watts. I've used television tubes at full spec as well; they were developed to be reliable in a hot environment with many tubes in an enclosed space.

WE rated the 300B at 40 watts dissipation, but buried in the spec is the caution that this would significantly reduce their lifetime - they are not rated as conservatively. So while I don't think there is a universal rule, I do agree with the idea that it's an issue worth looking at closely.


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  • RE: 6B4G Single End amp in a new suit ? - Paul Joppa 13:04:16 04/05/17 (0)

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