I'm using those very same S&H tubes in my Manley Steelhead. And this will killya: They were given to me by a friend who converted to solid state. Don't ask me if I like them, because I am biased to love them, now that you told me how much they could be worth.
You wrote, "Perhaps you are biased in your listening, I'm not, very engineer based analytical." What about this exchange of ideas would support that idea? It's a scientific fact that we as humans harbor subconscious biases that affect what we see and hear, no matter how hard we may try to be neutral or "analytical". Spending big bucks on a tube would tend to enforce a very conscious bias in favor of that tube. This is why science that reports human behavior or relies upon it always has to include enough subjects to ameliorate the bias effect and preferably be conducted in a blinded or double-blinded fashion. I am sure you know this, and that is all I was trying to say. You could be analytical as a single observer, if you are making measurements with a reliable instrument. But since this is all about opinions, there is no avoiding bias.
