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Vintage Raytheon 12at7 Ecc81 Very Strong & Balanced 5900/5500umhos & 14.2/17.0mA, US $390 – Picture 0
Vintage Raytheon 12at7 Ecc81 Very Strong & Balanced 5900/5500umhos & 14.2/17.0mA, US $390 – Picture 0

Vintage Raytheon 12at7 Ecc81 Very Strong & Balanced 5900/5500umhos & 14.2/17.0ma

US $390

  • Matawan, New Jersey, United States
  • May 25th
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Raytheon 12at7 ***** Tested on our new 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 = 5500/5500 µmhos  & Industry Bogey plate current =   11.0/11.0mA Results =  5900/5500µmhos  ~ 14.2/17.0mA   USA Shipping $6 ~ Higher Overseas I have many other types of tubes  ~  Just Search MY store  No Additional Shipping Charges  All tubes are Guaranteed          #39 ~~~~  Please click on the link below to view more items in my store.  ~~~~~~~~                                                GreenGirl's Guaranteed VintageTubes

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