Vintage Mullard 12AU7 ECC82 Vacuum Tube Very Strong & Balanced Harman Kardon

Description

Mullard  12AU7 ECC82 Vacuum Tube
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The measurements provided were made on a Triplett 3444 that has been modified to test tubes
in accordance with the original manufacturer’s stated test conditions, including bogey values.
This includes the use of cathode bias where specified.
This tester was prepared by Paul Hart of Roswell, GA.
Further information is available on request.
Industry Bogey transconductance =2200|2200µmhos
Industry Bogey plate current =10.0|10.0mA
Results =2240|2160µmhos ~ 13.0/11.6mA
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