2x Siemens Valvo EF86 6267 Mesh Plates Matching Codes - Hamburg 1960 8Y1 - NOS
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2x Siemens Valvo EF86 6267 Mesh Plates Matching Codes - Hamburg 1960 8Y1 - NOS

$172.00
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Product Summary Model: 1960 Siemens Valvo Hamburg EF86 6267 Mesh Plates (Made in Germany) Soundlumia Tube Sound Rating: 9.0/10 - Excellent 1960s Hamburg production - The real King of Bass - Unparalleled musicality with great substance and weight in midrange presentation Date codes: 8Y2 D0D (8Y2 = EF86 production gen #2, D = Hamburg, 0 = 1960, D = April) GM (Mutual Conductance) test result: 107%/92% NOS Silkscreen: 95% - 100% Packaging: New white tube boxes. Professional Tube Testing This set was tested and certified by RoeTest V11 tester with the following result:  Tube 1:  Measured transconductance (GM): 2.14 mA/V  - 107%  (100% = 2.0 mA/V) Measured plate current (IA): 3.062 mA  - 102%  (100% = 3.0 mA) Tube 2:  Measured transconductance (GM): 1.84 mA/V  - 92%  (100% = 2.0 mA/V) Measured plate current (IA): 2.627mA  - 88%  (100% = 3.0 mA) NO shorts, leakage or gas. NO noise or microphonics. Curve trace is also included in the original RoeTest report.

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