I picked up a couple of HA4000's recently, having only seen them
before in pictures.  I was interested in putting some real DEC
equipment into my home network of Vaxes and Pmaxes.  However, 
giving them a good look, I realize I don't have the foggiest
idea how to hook them up.  In the middle of the device, there
is a clamp, with a little sharp thingy that looks like it's supposed
to dig into a wire of some kind, passing through there.  Would 
that be a thinnet coaxial cable?

Doug