Here is a Vintage B&K Dynascan Dyna-Jet Model 747 Mutual Conductance Tube Tester Checker with full paperwork. Fixer Project for Parts or Repair. Nice and clean inside and out but the meter doesn't register a tube. Tested a 6L6 and it heated up but never got any meter movement. Meter jumped a few times and moved but no test results. Easy project. An excellent addition to anyone's collection. Money back guarantee you will not be disappointed.Click the "Enlarge" tab to view all pictur...es for details. I do not offer Buy-It-Now's and do not end my auctions early. Buyer to pay actual shipping of 18 lbs