I had Cary 300SE monoblocks in the early 90's. They came with Cetron tubes. One had a piece of glass in it. I was a tube newbie and freaked. I called Cary and Dennis answered the phone. He said it was no big deal and sometimes happens when a tube is made. He offered to send me another tube but I declined.
The WE 300B's had been announced but they were not in production when I had the Cary amps. I actually preferred TJ Full Music 300B's over the WE's. So did many others.
Which 300B's are you using in your 300SEI?
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