2x Telefunken EF86 6267 Silver Plates - ◇ Bottom - Ulm 1964 - Same Code - NOS
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2x Telefunken EF86 6267 Silver Plates - ◇ Bottom - Ulm 1964 - Same Code - NOS

$244.80
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Product Summary Model: 1964 Telefunken EF86 6267 (Made in Germany) Soundlumia Tube Sound Rating: 9.5/10 - Outstanding  Early 1960s Ulm, Germany production - Unparalleled sound characteristics and superb build quality - True holographic sound stage with layered details and ultra clarity Date code: U 7004206 (U = Ulm, 4 = 1964)   GM (Mutual Conductance) test result: 92%/112% 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): 1.83 mA/V - 92% (100% = 2.00 mA/V) Measured plate current(IA): 3.047 mA  - 102% (100% = 3 mA) Tube 2: Measured transconductance(GM): 2.24 mA/V - 112% (100% = 2.00 mA/V) Measured plate current(IA): 3.01 mA  - 100% (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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