Thanks guys for the responses. I've already spoken with Craig regarding these, since he's done all my rebuilds so far. I'm not sure a rebuild is needed just yet, as these sound pretty darn good as is. As far as the 12AU7 question, I found a pair of RCA cleartops that came with my Foreplay so I'm using those. I still would like to know exactly what these telefunkens are. They look exactly like the 12AX7. If I get my camera back I'll post some pics.