I just bought a Bellari phono stage and the tube doesn't seem to light up. It gets a bit warm, but it doesn't glow in the dark or anything. Is that right? I figure it wouldn't work if the tube wasn't working - or would it?
I actually tried a pair of E.H. 12ax7 and actually put my hand on them 10 minutes after light up ( just warm ) and couldn't see any light,but they worked fine.It depends on the tube type,construction etc......
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