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Siemens

Siemens EF86 6267 Matched Pair Orig. Box - Telefunken Labeled - Same Code - NOS

Siemens EF86 6267 Matched Pair Orig. Box - Telefunken Labeled - Same Code - NOS

Regular price $208.00 USD
Regular price Sale price $208.00 USD
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Product Summary

Model: Siemens EF86 6267 (Made in Germany)

Soundlumia Tube Sound Rating9.2/10 - Outstanding 

Date code: 11042 (Siemens internal code)
 
GM (Mutual Conductance) test result: 100%/108% NOS

Silkscreen: 85%

Packaging: Original Telefunken tube box

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 mA/V - 100% (100% = 2.00 mA/V)
Measured plate current(IA): 2.365 mA  - 79% (100% = 3 mA)

Tube 2:

Measured transconductance(GM): 2.16 mA/V - 108% (100% = 2.00 mA/V)
Measured plate current(IA): 2.605 mA  - 87% (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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