Our practice space, which is rapidly turning into a graveyard for vintage tube gear, has a 60's vintage Alamo Paragon bass amp. It has no labels marking any kind of technical info on it so I am not sure what impedance cabs are safe to attach to it. Is anyone familiar with these things? Related to this, is there a way to easily find out what the imedance taps on the output transformers of tube amps are? Thanks.