Sieman-Phillips 7308 and JAN Phillips 6922


Hi all. In comparing the two tubes innards, I noticed that they are identical as far as I can tell. Is it possible the JAN or the Sieman versions were rebranded? Are they the same tube possibly? They even sound similar. Thanks.
monjul

Showing 1 response by wgallupe

JAN stands for Joint Army Navy. Tubes were taken from a standard production run and screened for closer tolerences. Only the tubes that met the military's requirements got the JAN desgination.