Mazda
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Product Summary
Model: Mazda EF86 6267 (Made in Belgium)
Soundlumia Tube Sound Rating: 9.0/10 - Outstanding
Lush and warm vintage tone, intiimate vocals, wide sound stage with layered details
Date code(s): L8F4 (L = Mazda, Brussels, 3 = 1963, F = June, 4 = Week 4 of production month)
GM (Mutual Conductance) test result: 100%/105% NOS
Silkscreen: 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): 1.73 mA/V - 87% (100% = 2.0 mA/V)
Measured plate current (IA): 12.41 mA - 80% (100% = 3.0 mA)
Tube 2:
Measured transconductance (GM): 1.39 mA/V - 70% (100% = 2.0 mA/V)
Measured plate current (IA): 1.945 mA - 65% (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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