Yeah, tangent, despite the man behind the curtain (pay no attention to him!) I am human...
When Bob Pease of Nat.Semi. fame describes in one of his books that he can never remember which terminal on LEDs is positive, that he has to derive it every time, I totally identify with that. I always ignore the flat and instead look at which lead connects to the reflector to figure it out...
I just looked at the Jung thread on diyaudio.com - poor Per Anders! Fred Dieckmann (sp?) immediately concluding that Per was going to use all of the "valuable" information from diyaudio to pursue a commercial venture was, to me, nothing short of hypocritical - but Fred is one of the most offensive members over there. I was really surprised at how vitriolic Jan Didden was in some of his posts; definitely lowers my estimation of the man. Too bad that it's just a few of the members there that make the place so unfriendly... unfortunately, the most prolific posters.
ppl - the Vbe article by Pease is a great read but I find that the -2.1mV/C approximation is most useful most of the time, even if the true variation depends quite a bit on Ic.
edit: grammar