[ARC5] 6AG7 and 6AG7Y

[Fuqua, William L.]

Does anyone know the difference between the 6AG7 and 6AG7Y tubes?
Can't find full spec on Y but I do know there is a big difference between the 4CX300A and 4CX300Y tubes.
Maybe the 6AG7Y is later more durable tube???

73
Bill wa4lav
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