How long is the break-in time for a Sophia Electric Blue 6SN7 tube?

Thanks everyone for your information--much appreciated.  I may just start turning things off between sessions.  I've had the 3 tubes in my DUDE on other than during storms 24/7 for about 4-5 years with no drop off in performance so far.  The MW 5400 had been unchanged in the same way since about 4 years ago.  Still has the same NOS Mullard GZ34 tube in the PS.  

Bob

At 50 hours, they are sounding even better now.  Sophia said 100 hours will be the mark when they reach their best.  Sue at Sophia also told me to start shutting off the Modwright player at night so the tubes last their longest.  The 24/7 except for storms will be coming to a close it appears.

Hey Chuck,

I have no more TC left and quite a bit of stuff to either touch up with TC or do the first time. I have made some very good changes in cables over the past couple years since applying TC. Would I be correct in that you have no more either? I have about 50-60 individual tube pins, spades, bananas, splitters, RCA pins, cartridge pins, and IEC prongs that need the treatment. I’d love to have about 0.3-0.5 ml. to get this all done. I still remember quite vividly the jumps in performance near the 4 and 8 week periods, and maybe a little bit after that, too. I have about several different products from PP that all made a significant difference in the reality of my system. Anyone with extra? I’d be a buyer at about 100 bucks.

Bob

Thanks all for the helpful information.  I must eat crow on a couple things I wrote:  1.) There was an incredible difference in sound quality when I finally replaced all 5 tubes in my TRL DUDE was NOS RCA tubes from Andy's Vintage Tubes in Michigan.  The sound was so much better than when I first got the DUDE from a previous owner that I'm not sure he even knew what the DUDE could really sound like.  

2.) I am now turning off the system between listening sessions to conserve the tube life as best I can.  It doesn't seem to take that long before the system sounds near its best--then subtlety gets better from there.  

Bob