Mullard
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$104.00 USD
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Product Summary
Model: Mullard EF86 6267 (Made in United Kingdom)
Soundlumia Tube Sound Rating: 9.0/10 - Outstanding
Lush and warm vintage tone, intiimate vocals, wide sound stage with layered details
Date code(s): B4K4 (B = Blackburn, 4 = 1964, K = November, 4 = Week 4 of production)
GM (Mutual Conductance) test result: 102% 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): 2.03 mA/V - 102% (100% = 2.0 mA/V)
Measured plate current (IA): 2.875 mA - 96% (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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