This is another of my favorite companies. There are many good sites dedicated to the old Dynaco company, with many focused on vacuum tube equipment. A good general site is:http://home.indy.net/~gregdunn/dynaco. He’s done a good public service in putting together all the information he has.
My interest in Dynaco is focussed on 3 pieces of equipment: Stereo 120 power amp, AF6 tuner and the SCA80 integrated amp.