What are you using for your "new tubes" and where did you get them from?
Tubes for Mcintosh MR71
I've got a McIntosh MR71 tuner that I’ve done some tube rolling on but I have not been very pleased with the results. What I think are new tubes are resulting in increased background noise and poorer selectivity. I don’t have a tube tester so I can’t check tubes to confirm they are “new”. I am about to get the tuner aligned and want to use the best tubes I can since my understanding is the tubes effect the alignment (with the obvious exception of the audio tubes). Has anyone found what they think are the best tubes for use in this tuner?