Mullard
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Product Summary
Model: 1966 Mullard EL34 6CA7 (Made in the United Kingdom)
Soundlumia Tube Sound Rating: 9.5/10 - Exceptional
Date codes: Xf2 B6L2 (Xf2 = Mullard EL34, B = Blackburn, 6 = 1966, L = December, 2 = Week 2 of production month)
GM (Mutual Conductance) test result: 108% of NOS/NEW
Silkscreen: 90% - 100%
Packaging: NEW white tube boxe.
Professional Tube Testing
This set was tested and certified by RoeTest V11 Professional Tube Testing System with the following result:
Measured transconductance (GM): 8.25/8.12 mA/V - 125%/123% (100% = 6.60 mA/V)
Measured plate current (IA): 145.29/132.77 mA - 145%/133% (100% = 100 mA)
NO shorts, leakage or gas. NO noise or microphonics.
Curve trace is also included in the original RoeTest report.
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