Mullard
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$124.40 USD
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Product Summary
Model: Mullard Z729 EF86 (Made in United Kingdom)
Soundlumia Tube Sound Rating: 9.0/10 - Outstanding
Lush and warm vintage tone, intimate vocals, wide sound stage with layered details
Date code(s): BY0 R1?4 (BY0 = EF86, R = Mitcham, 1 = 1961, 4 = Week 4 of production month)
GM (Mutual Conductance) test result: 88% of NOS
Silkscreen: 100%
Packaging: NEW white tube boxes
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): 1.76 mA/V - 88% (100% = 2.00 mA/V)
Measured plate current(IA): 2.725 mA - 91% (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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