Is anyone familiar with gas leakage paths through soft soldered joints?
Part of a vacuum electron device which I am working with has a puzzling
leak.  It occurrs only when the device is at a temp of 85C or above.  The
joint is between a cold-rolled steel piece and a Carpenter-42 piece.  We
suspect it is either in the solder itself or in the interface between the
solder and the cold rolled steel.  Appreciate all input.

Thanks,

Sam

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