No, it's not interchangeable with the 6922. I've used this tube in an ARC LS-25 Mk. II and heard it in the ARC Ref2 Mk.II. It's a great tube, but it has to be used in equipment specifically designed for it.
There are other tubes that can be used. There was a discussion about this on the audioasylum. Check the digital drive chat room for the date of September 5, 2002.
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