Id say 100h+. But it may be valve dependent. I find that all nos valves need a bit of time before they peak. Some more than others.
With the right 6sn7 that 2.4se will sound very nice. Too bad the jacmusic sylvania 7n7 (15 eur) with adapters will only fit with the lid off.
I have the following tubes to chose:
6SN7GT Brimar UK NOS. Red logo. Clear glass 170 GBP
6SN7GT Brimar UK NOS. KB/FE version. Black glass. 400 GBP
6SN7GT / VT231 USA NOS, Kenrad 160 GBP.
6SN7GT USA VT231. NOS, Tung-Sol, L round anode 300 GBP
6SN7W Sylvania USA NOS. Metal base 180 GBP
6SN7GT Mullard, UK. NOS. 190 GBP
Does anyone have experience with these tubes on the 2.4 SE?