What tubes for Mac MR-71 tuner?

What tubes are recommended for a Mac MR-71 tuner? Has anyone found that re-tubing makes a difference?

lapaix07-02-2003 5:53pm

ykk Details Discussions Posts This discussion Message User 124 posts 02-12-2004 at 07:02pm Copy Comment URL Report Comment Edit Delete Musicslug is right. I have original tubes with my MR71 but aligned and checked every three years, and it sings all the time.