Hi mordy and guys galore...finally managed to catch up with just a few of the pages I've been missing lately, and your post has prompted me to say just a couple (?!) of words before zzzzzzzzzz.
I too have just revisited a previously loved combo of Sylvania "Chrome Dome" 7N7 + NU Black Glass 6SN7 (amongst the finest of this family, to be sure lol!) driving my GEC CV2523s, as part of my extensive temperature testing of the entire internals of my Euforia, to confirm that the EL11/12 (Spezials, in my case) combo does
not cause any overheating issues...and already I am extremely surprised at my initial findings - pleasantly so, lol!
. And from cursory tests of the case and trafo housing before opening her up again properly tomorrow, this 'standard'/approved setup of 6SN7/6AS7G is running at far higher temperatures....(will post the actual figures here and on the Euforia thread tomorrow, as I want to reassure any folks who may still be interested in using the EL tubes - and will also be posting my in-depth comparison between my own EL setup and the aforementioned combo, to complement my comments already made when comparing with the Mullard ECC31/GEC setup). Plus, I have my own points to make re. use of these tubes, and I shan't be pulling any punches LOL!!!
...CHEERS!...and G'night all...