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Sophia Electric tube quality

I wonder if others have experienced poor quality with the Royal Princess 300b tubes. Purchased a new pair and one shorted out in a couple of months in their amp. Sophia replaced it and the new pair were extremely microphonic -- rang like bells when tapped with just my thumbnail. Sophia's response to my complaint was, "Stop tapping the tubes.
wfowenmd
mt10425
1,138 posts
 
You're indicating you think Sophia's response was disrespectful or something. Buy tubes from Kevin Deal, then call him and say you were thumping on them and you think they're microphonic. His response will burn a tattoo on your ears with unchristian language that may question your parentage and other cognitive abilities. I'd buy from him anytime and I own a Sophia amp (my second).
wfowenmd OP
95 posts
 
Despite your recommendation of not to tap the tube, well constructed tubes do not ring when tapped. 

jetrexpro
506 posts
 
Emission labs 300b XLS come with instructions never to tap on a tube that is in use.
vicweast's avatar
vicweast
150 posts
 
If they won't let us tap an in-operation tube, can we at least "lick" them? 

I do not think it would have occurred to me to actually do either, and now that you bring it up ...I still won't.)
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