You are close enough that you might want to come on by and give Monique a play. The burritos are good. I'll buy.
Yes, the obnoxious tubes have been identified and removed from our lives. I have a row of the evil doers on a shelf near my test bench. They stare down at me. I think I'm keeping them to make sure I remember how rough it can get.
Currently we are shipping with Tung Sol 6SL7's, Shuguang 12AU7, EH EZ81.
All those bad tubes were from a single run out of the Shuguang factory. The especially nasty bit was that they all checked great in the shop. The trouble showed up only after being bounced around in transit. The problem ended up being poor (contaminated) solder connections inside the pins of the tubes.
Thank you Jule for that informative reply. I appreciate it very much! I also appreciate the invite! If my wife and I find ourselves with a planned trip to the Santa Cruz area, we will definitely plan on swinging by.


