Can't find this anywhere on line Can anyone tell me what the layout of the three preamp tubes are? I need to replace them and I'm still learning. One of them has to be the preamp, but what are the other two? I'm still learning how to read a schematic, so I'm not sure which of the 3 12ax7's do what. Thanks. This is not a BD reissue, this is an actual BD From March 1996.