Do you possibly believe that you can pre-heat a tube to anywhere remotely close to operating temperature?
uh, did I ever say that?
And regarding your last statement that there is no such thing as heat potential in a tube. Really?
Despite referencing several textbooks as well as the web I find no mention of the phrase "heat potential" when it comes to vacuum tubes.. I make no apologies if I misinterpreted what you meant when you used unconventional terminology.
So you believe that the anode and cathode in a typical vacuum tube are EXACTLY the same temperature?
uh, did I ever say that?
Granted, the cathode is generally heated to increase electron emission. That in no way negates the fact that keeping the tube warm when it is not in use will decrease warm up time.
You all can ignore what the original poster asked and try to nit pick responses, but the fact remains... if it starts out at a warmer temperature it will reach it's operating temperature more quickly. That is crux of the debate, double speak and patting yourself on the back for clever responses "I just knew that you were going to reply the way that you did" doesn't preclude the fact that any of you who dismissed the reality that preheating the equipment has a positive effect were wrong.
.