Siemens
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Product Summary
Model: Siemens EF86 6267 (Made in Germany)
Soundlumia Tube Sound Rating: 9.2/10 - Outstanding
Date code: 11042 (Siemens internal code)
GM (Mutual Conductance) test result: 100%/108% NOS
Silkscreen: 85%
Packaging: Original Telefunken tube box
Professional Tube Testing
This set was tested and certified by RoeTest V11 Professional Tube Testing System with the following result:
Tube 1:
Measured transconductance(GM): 2 mA/V - 100% (100% = 2.00 mA/V)
Measured plate current(IA): 2.365 mA - 79% (100% = 3 mA)
Tube 2:
Measured transconductance(GM): 2.16 mA/V - 108% (100% = 2.00 mA/V)
Measured plate current(IA): 2.605 mA - 87% (100% = 3 mA)
NO shorts, leakage or gas. NO noise or microphonics.
Curve trace is also included in the original RoeTest report.
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