@decooney, thank you so much for bringing up that issue with your signal tubes. After reading your post,I remember that I read about that phenomenon some time ago. I am going to give that a try.
I had an issue today that my power supply tubes were not firing up. I contacted Aric. Buy the way, what absolutely wonderful customer service!! He responded within 20 minutes,on a Saturday,on a holiday weekend, on a product I bought used.
He had me replace the fuse, and the rectifier tube. The Motherlode II is now up and running. I put the Linlai’s back in,and got that distortion”grunge “ that @decooney mentioned. Now to try to tap that grunge away.