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Thoughts on 50s and 60s Dutch made 12AU7s

I have a number of late 50s and 1960 Dutch made 12AU7s with short gray plates and large "O" getters. I wonder if anyone has compared these vintage and type with the earlier made long plate "D" getter Dutch 12AU7s.

Thanks in advance!


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Topic - Thoughts on 50s and 60s Dutch made 12AU7s - jcoe 09:09:52 01/01/07 (0)


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