Sweet offer indeed not a chance un hell here but no doubt some will nab some up!
Not enough exp here with tubes to comment anyhow with any degree of authority. (rarely ever had a chance to deal with such since I was a kid and that was looong ago)
That said q,,, what model of Alps r u using? looks like i need to build anuber basic preamp aka volume only here for a friend with budget of near zero (higher than mine still! lol).. figure might as well inquire as it might be a viable idea.