1. The amp is not with me, I do remember they are ruby 6l6 tubes on output, 12ax7s are unknown brand at this time, I was told it was freshly tubed and biased about a month ago.
2 & 3: the cab is 16 ohm and a speaker cable is in the 16 ohm tap. the amp sounds good its just the master volume does nothing. the channel volume controls the volume on active setting.