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Original Message

RE: Dynaco 400 amplifier problems,

Posted by GP49 on February 24, 2012 at 13:49:36:
THANKS! For future reference I'm going to keep your message filed away.

I know of one Stereo 400 that was drilled in our shop for the additional TO-3 devices. I think it was from before the Stereo 416...but after Frank Van Alstine announced his "Double 400." A steel jig was made with the pattern for drilling
the holes, and I remember the placement of the jig had to be exact; there wasn't
any room for error.

Frank could be a curmudgeon; he even said that Dynaco stole his Double 400 design for the Stereo 416...right down to an error he made. But he has never, to my knowledge, ever said what that error was.