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JHS Sylvania 12AT7 WA 3 Mica Vacuum Tube Strong & Balanced 4700/4500, US $170 – Picture 0
JHS Sylvania 12AT7 WA 3 Mica Vacuum Tube Strong & Balanced 4700/4500, US $170 – Picture 0

Jhs Sylvania 12at7 Wa 3 Mica Vacuum Tube Strong & Balanced 4700/4500

US $170

  • Matawan, New Jersey, United States
  • Jun 19th
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 JHS Sylvania 12AT7 WA 3 Mica Vacuum Tube Strong & Balanced   ***** Tested on our proprietary  tester , the E3444 Triplett/Westmore 501 : It's a Triplett 3444 / Westmore 501 that has been enhanced. This tester uses regulated power sources for the bias, plate, & screen voltages, as well as modified operating & testing procedures. Filament voltage is also controlled.  Tubes are tested in accordance with the manufacturer's specifications; measurements closely align with a laboratory tester built to rigorously measure vacuum tube characteristics.  Tubes can be accurately matched for gm & plate current at the manufacturer's specified test points or at other specified test points. ***** This tester was prepared by Mr. Paul Hart of Falls Church , Virginia. ***** *********************************************************************  Industry Bogey transconductance = 5,500/5,500 µmhos  &  Industry Bogey plate current = 11.0/11.0 mA Results =    4700/4500  µmhos  ~   8.9/9.5 mA No- Limit Combined USA Shipping  $6  ~ Higher Overseas I have many other types of tubes   ~ Please search my store (click the red door) by brand , type , and construction No Additional Shipping Charges All tubes Guaranteed    Thank You!      ~~~~ Please click on the link below to view more items in my store ~~~~~                        GreenGirl's Guaranteed VintageTubes   207

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