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Re: Sylvania 6SN7GTB makes a big noise burst at turn on. Game over?

If the pins are clean, you have a tube that is close to shorting out the plate. Time to move on and get another $20 Sy GTB. On the other hand, your tube could fail and it really will not hurt anything if the sound you discribe is not hurting your speakers. Output tubes are what takes your amp out.
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