This Precision 612 tube tester has a solid state unit replacing the 5U4 tube. It was calibrated a few years ago but has been sitting most of the time. It comes with a printed operational manual and schematic. Also, a printed current tube data manual. Included is also a VIBRA-DAPTER Model VB2.
The ‘NOISE TEST” sockets have been changed to Plate current reading. This was to match tubes at same settings and same IP current. It can be changed back to ‘Noise Test’ very easily. All parts are inside case.
Shown in a pic showing is testing a 5U4 rectifier tube.
Shipped Canada Post insured.