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In Reply to: Re: Need help identifying 12AX7 please (pic) posted by Jim McShane on September 24, 2004 at 14:22:27:
Jim,Are you saying that 'cross seams' at the top of the tube mean they ARE Mullard or ARE NOT Mullard?
Follow Ups:
Crossed seams appear on Amperex, Ei, and Japanese 12AX7s. A single seam appears on Mullards.
nt
the flat (not ribbed) plates indicate they are not Mullards.
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