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Telefunken

Telefunken EF86 6267 Red Tip Matched Pair ◇ Bottom - Ulm 1960 - NOS

Telefunken EF86 6267 Red Tip Matched Pair ◇ Bottom - Ulm 1960 - NOS

Regular price $365.40 USD
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Product Summary

Model: 1963 Telefunken EF86 6267 O-getter (Made in Germany)

Soundlumia Tube Sound Rating9.5/10 - Outstanding 

Early 1960s Ulm, Germany production - Unparalleled sound characteristics and superb build quality - True holographic sound stage with layered details and ultra clarity

Date codes: 

U9010007 (U = Ulm, Germany, 0 = 1960)
U1320380 (U = Ulm, Germany, 0 = 1959)
 
GM (Mutual Conductance) test result: 104%/100% NOS

Silkscreen: 100%

Packaging: New Telefunken reproduction 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): 2.08 mA/V - 104% (100% = 2.00 mA/V)
Measured plate current(IA): 3.302 mA  - 110% (100% = 3 mA)

Tube 2:

Measured transconductance(GM): 1.99 mA/V - 100% (100% = 2.00 mA/V)
Measured plate current(IA): 2.65 mA  - 88% (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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