Telefunken
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Product Summary
Model: 1958 Telefunken EF86 (Made in Germany)
Soundlumia Tube Sound Rating: 9.5/10 - Outstanding
1950s Berlin, Germany production - Unparalleled sound characteristics and superb build quality - True holographic sound stage with layered details and ultra clarity
Date code: B og 01 (B = Berling, og = June 1958, 01 = Internal #)
GM (Mutual Conductance) test result: 105% 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): 2.09 mA/V - 105% (100% = 2 mA/V)
Measured plate current(IA): 2.92 mA - 97% (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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