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Questions about tubes and gear that glows. FAQ

2 sources of heat

There is the heat the filament gives off and the heat the plate gives off. The KT66/6L6 tubes have lower heater requirements than the bigger tubes and will give off a little less heat there. As far as the plate heat, if you can reduce the idle current in the 6L6 versus the 6500/KT88 it will give off less heat. However the difference in heat from your listening chair may not be noticeable.

This is what I am running right now and it puts out massive heat, definitely a winter amp (304tl)






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  • 2 sources of heat - Chip647 18:04:01 06/24/20 (0)

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