01-03-15: Adg243Congratulations! I have 330 hours on my Ref250 and it sounds excellent.
I bought ref150 2 weeks ago and at 38 tube hours could not be happier. And many people are saying it will get better at 600 hours ! Boy oh boy
What color is the capacitors in your Ref150? In mine, 4 of the 6 small ones are gold and big ones are all white.