Four Hour Tube Amp Warm-Up

bolong +1; a weak tube can take a long time to warm up properly

Where is @tubebuffer these days?
As Confucius say, “Man with strong tube, need little time to warm up.”

After making some adjustments it is down to about a 2 hour warm up now.

Time has passed and the Sophia Electric EL34's are probably technically burned in now. I would say that about an hour and half use/warmup blooms them nicely. However, a couple of weeks ago I accidentally left the tube amps on for 7 hours unattended. When I got home that night and started playing I was taken back to the real, real "bloom." What can I say - there is this everyday operating dimension and then there is the dimension slightly beyond. I am hopeful that electrical theory will one day catch up.

Never experienced anything like that with pure tube amps. In fact I always find them quick to warm up. I once had a hybrid electrostatic headphone amp (grounded grid EL34 with solid state CCS outputs) that took like an hour to sound its best -- but I'm pretty sure that was from the transistors. 

@bolong I have to agree. 20 mins gets them up and running (same time needed to "warm up" my turntable bearing) but they do open up as the hours go by. By the time I’m turning the things off after 4+ hours, they’re at their sweetest and most three dimensional. This seems to hold at any time of the day too, so I don't think it's related to cleaner power as the day winds down.