Tube Replacement Problem - Audio Research SP9 MKiii- V1 Tube Goes Dark w/ new V2 installed

Quick Update @oldhvymec @tvad 

 I’ve cleaned everything and all tubes below work in a separate LS1 preamp as the sole tube. 

Here’s a summary-

SP9 preamp scenario 1- current state-  both sovteks work but I want an amperex in V2 location

SP9 scenario 2 - desired state-  V2 with amperex works, but sovtek in V1 goes dark, no phono

SP9 scenario 3- V1 w Amperex works and phono works, but Sovtek in V2 goes dark and line stages don’t work

SP9 scenario 4- Gold Lion 6922 in V2 works, and Sovtek in V1 works, all sound good from all outputs 

SP9 scenario 5- swapping the Gold Lion locations from scenario 4 and all works and sounds good

Scenario 6 - all individual tubes work fine during extended listening when used in a separate LS1 that has a single tube in the gain stage. As hoped the Amperex sounds best if only I could get it working in a pair in the SP9 :(

Hi TVad. Thank you. 
The Amperex always works. It’s the others that stop working when the Amperex is put into the mix. 
Then they all work fine under extended use in a separate tube preamp. Hence my bafflement. 

@tvad Sorry, off topic. Tvad, I tried to reply to a dm you sent me and it says you're blocking me. I know that's an error, so just letting you know.