Very interesting.
Could you post a picture of your set-up and maybe show a link to the adapter you are using?
Are you just putting one single triode 6J5 into each driver socket using an ECC31 to 6SN7 adapter?
I would have thought each driver socket would need two 6J5's connected by a standard dual 6J5 to 6SN7 adapter, which is what we used with Garage amps.
I would think your 6J5 set up could be modified to hopefully remove the noise.
+1. @Audict123 please share a photo of your setup with those 6J5's in Elise. I too was under the impression you need two 6J5's per socket, being single triodes vs. the dual triode tubes that are used in all other cases. I've found the dual 6J5's however sub par as drivers, and were better as powers - though combined with 6BL7's + dual 6J5's (3 tubes per socket as drivers). I don't recall if dual 6J5's as powers are electrically compatible or not, but in any case I'm about to sell off all my 6J5's, so maybe I can try a new idea before it's too late, if anyone has input. Otherwise I had actually concluded that the stock power tubes were superior to the aforementioned 'Christmas tree' setup.