I am sorry for the misunderstanding, but TAD does not make the 6V6GTB anymore and they replaced it with the 6V6GT-STR which is a far superior tube to the 6V6GTB. They have been shipping 6V6GT-STR to us instead of 6V6GTB. There were a lot of quality issues with the 6V6GTB.
Would you like the 6V6GT-STR or would you like a refund?
Thank you,