This is a pristine example of a Precision 612 tube tester. The Precision 612 is a basic Cathode Emissions tester with battery testing functionality. It does not have any VOM functions. Calibration was spot on and did not have to be changed.
Precision 612 Tube Tester
February 19, 2011February 19, 2011 | | 3 Comments | 7:20 pm