Guys:
I received a NOS Bendix 6X5GT, produced in 1958, today and I just replaced a Sylvania (made by RCA) 6X5 in the power supply of my Mapletree Preamp. Folks that think a rectifier tube does not impact sound don't know squat! I am happy I made the investment in this tube and can only imagine it will get better after 50 hours or so!
Ken