At 07:15 AM 4/22/2014, Jean-Pierre Desrochers wrote: >Well I matched a lot of NPN pairs (2N3904) >and PNP pairs (2N3906) last weekend using Bob Moog's >little matching setup with very good results Just as an aside, the method Patchell and I use is way more precise and simpler ... http://home.comcast.net/~ijfritz/MiscProj/transmat001.pdf Ian