Hi,
I have noticed some weird "holes" in the getters of the power tubes (6N13S) of my amp. The holes are only visible if I hold the tube against light. I have not noticed such patterns on any other tubes, though I do not have any other big tubes in use.
Is this normal or a sign of some problem (too hot, too high voltage etc)?
I have noticed some weird "holes" in the getters of the power tubes (6N13S) of my amp. The holes are only visible if I hold the tube against light. I have not noticed such patterns on any other tubes, though I do not have any other big tubes in use.
Is this normal or a sign of some problem (too hot, too high voltage etc)?
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Or a electron (or even ion) beam impact pattern....too hot, too high voltage etc?
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