A very interesting thread that has me contemplating the looming drivers installation on the PL400 that I'm giving the full WOPL treatment to thanks to Joe's FABULOUS kits. Wow, White Oak's products are truly top notch in terms of buildability and quality.
Anyway, so given that I have nice stack of MJ21196G NPN output transistors - enough for two PL400 uber rebuilds and that I'm able to conduct the measurements using the procedure Joe describes in his post from 9 years ago, recording the base-emitter voltage for each, and then I can sort those transistors as Joe also describes.
My dumb question is: how should I physically install well-matched transistors? across from each other in the same row on a channel so that a given pair in a row within a channel are similar (like one of the red lines in the attached picture)? similar values in each row across channels (both of the red lines similar)
? something else? I recognize that this is a pretty naive question. Consider me an ignoramus in this realm if you will, I'd just like to try to make the 'best' use of these wonderful components I have to work with so that I might end up with the best sounding PL400 in the history of PL400s. 
Anyway, so given that I have nice stack of MJ21196G NPN output transistors - enough for two PL400 uber rebuilds and that I'm able to conduct the measurements using the procedure Joe describes in his post from 9 years ago, recording the base-emitter voltage for each, and then I can sort those transistors as Joe also describes.
My dumb question is: how should I physically install well-matched transistors? across from each other in the same row on a channel so that a given pair in a row within a channel are similar (like one of the red lines in the attached picture)? similar values in each row across channels (both of the red lines similar)
? something else? I recognize that this is a pretty naive question. Consider me an ignoramus in this realm if you will, I'd just like to try to make the 'best' use of these wonderful components I have to work with so that I might end up with the best sounding PL400 in the history of PL400s. 
