DK Design VS- Reference vs Signature

Larry,
When I took the older pair out and replace it with the new pair. Every thing was fine. But when I put the older pair back in, the right channel tube lost its vacuum. It stop lighting up. I really don't understand how this could have happened. Can you explain to me what happen and How can I prevent this from happening?
Ron

Larry, is Shari Graham, late of Thiel, working for you now?

Dan, Shari is indeed working for LSA/DK, and what a pleasure it was to spend time catching up with her at CES! I did not drill her on whether she prefers Thiel or LSA speakers ;-)
Art

Dabarrie,
Herein lies the reason the tube nay sayers exist (I guess for other reasons too)they can be delicate. Surprisingly, I have dropped tubes,just the other day, clunked them together and so on with no issues. Just bad luck.
As to Shari--what a jewel.
Shari worked for THIEL when I was with them--I knew of her terrific work. When I found out she was moving seventy two miles west from Lexington to Louisville, I asked her to work for LSA. SHE IS TERRIFIC!!
"...prefers THIEL or LSA speakers". You guys are evil!HA!
She's in Florida right now, her father is having health issues..she'll be back Monday.
Best,
Larry

Shari is the stuff of customer service legend. Her working for you speaks volumes about you and what we might expect from LSA. Well done!