General Gear and Tab Season IV: Can it play barre chords? in Kit & Tab Posted May 10, 2016 That just reminded me of something that might be of interest. Are you familiar with the 12DW7? Because one half is supposedly 12AX7, and the other 12AU7. Only thing is that I'm not sure which way V1 is wired on the DSL, but even if it's the wrong way around, I'm guessing you can easily rewire the V1 socket. Or maybe I'm looking at this the wrong way. Yeah that makes sense. I'd keep the Chinese ones in V2 and V3 if they're working properly though - V1 has the biggest effect on the sound. Unless it's an amp like the 6100/6101, then things get confusing. Yeah I don't intend on paying for more tubes for V2/V3 unless it was really necessary. Got the Svetlana EL34 in today. Initial reaction is that it sounds better but I'm not really qualified to explain how. Less muddy/dark maybe? I'll have to put the old one in tomorrow maybe just to be sure. Out of interest how long do tubes normally take to cool down?