Groove tube 6l6's

Mornin all,
Anyone have an opinion on dropping 6l6ge's into a Mark 1 or Lonestar without having to re-bias? what rating will work?

Drunkdolphin

Just respect this :


Mesa Boogie Groove Tubes
Color Code Grade

Red 4
Yellow 4
Green 5
Grey 5
Blue 6
White 6

Ooops ! i do it again :

Mesa Boogie color RED = Groove Tubes grade 4
Mesa Boogie color YELLOW = Groove Tubes grade 4
Mesa Boogie color GREEN = Groove Tubes grade 5
Mesa Boogie color GREY = Groove Tubes grade 5
Mesa Boogie color BLUE = Groove Tubes grade 6
Mesa Boogie color WHITE = Groove Tubes grade 6

In Fact all Groove tubes 6L6's from grade 4 to grade 6 will work on Mesa Amps ! Note than i have never tried this, i always choose Mesa Tubes !!!