Precision Apparatus Model 912 Vacuum Tube Tester Used

US $69.99

  • San Luis Obispo, California, United States
  • Jan 29th
Precision Apparatus Model 912 Vacuum Tube Tester. This unit is in good working order and comes with a Noval 9 pin socket (early models did not have a 9 pin socket). The photos show the short indicator light as well as the meter functioning properly on a known good tube. The chart is intact and spins freely and the chart light works as well. The plug wire is in good condition. The plug connector works but shows signs of wear and tear (see photo). The overhead connector cap works but the hard plastic insulation is cracked in several places and probably should be replaced. The wooden case is in fair condition (see photos). The latches and handle are in good working order and all four plastic feet are intact. Comes with two tube test data manuals (see photos). The original tube testing instructions are not included but can be found online from several different websites. I replaced the neon glow lamp (short indicator bulb) with an exact NOS replacement (GE NE-31 lamp). I also cleaned the tube socket pins, electrical contacts, and switches with DeoxIt cleaner. I did not test the battery testing feature of this unit, so I make no claims as to the functionality of this feature. This unit has probably changed hands many times since manufacture, so I do not have a full history as to what, if any, changes have been made over the years. However, I have used this unit to test many tubes (100+) and it works as originally designed. Also keep in mind that this an antique and the electrical components can stop working at any time, so that is why it is sold as is without the option for returning the unit. Please ask questions before bidding. Thanks.

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