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: tE2 ⟂8I (tE2 = EF86 Generation #2, ⟂ = Telefunken Berlin, 8 = 1958, I = September)
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 Professional Tube Testing System with the following result:
Tube 1:
Measured transconductance(GM): 2.05 mA/V - 102% (100% = 2.00 mA/V)
Measured plate current(IA): 3.017 mA - 101% (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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