I ordered three different kinds classic vacuum tubes.
Price was reasonable.
Let me explain the three types.
That's 6N9P , 6G2P , and 6P9P .
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6N9P can be used as a replacement for 6SL7/ECC35.
6G2P can be used as a replacement for 6SQ7 and similar to 6Z-DH3A!
With attention for connection of pins 1 and 3, 6P9P is possibility replacement for 6J4P and 6888.