This set was tested and certified by RoeTest V11 tester with the following result:
Tube 1:
Measured transconductance (GM): 10.25 mA/V - 91% (100% = 11.3 mA/V)
Measured plate current (IA): 42.59 mA - 89%/89% (100% = 48 mA)
Tube 2:
Measured transconductance (GM): 10.38 mA/V - 92% (100% = 11.3 mA/V)
Measured plate current (IA): 45.67 mA - 95% (100% = 48 mA)
NO shorts, leakage or gas. NO noise or microphonics.
Curve trace is also included in the original RoeTest report.