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Pops 300B tubes on turn on in my Vac

Put a set of carbon plate Sophia's in my Vac70/70 amp.Over the last week on start up a couple of the tubes have sparked on the top of the tube resulting in a "pop"sound.
Is this something i should be concerned about it doesn't happen all the time.The set is brand new.
I don't remember that happening before with my amp.
wavetrader

Showing 2 responses by wavetrader

wavetrader OP
260 posts
 
no, not yet anyway the spark has occured in the back row on the left channel and the right channel also.I have checked the seating of the tubes and they seem tight.I have powererd the amp down and will try again later to power up.Can arching blow my amp or damage it this is a push pull design.

thanks
wavetrader OP
260 posts
 
Hello Bill,
Yes i set the bias at the lowest setting.I am going to send the 2 back as this amp uses 8 of these and it's a chance i don't want to take to blow this baby.
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