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Siemens

Siemens EL84 6BQ5 Matched Pair - Munich 1962 rX3 - Same Code - Near NOS

Siemens EL84 6BQ5 Matched Pair - Munich 1962 rX3 - Same Code - Near NOS

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Sound Sample:

Product Summary

Model: 1962 Siemens EL84 6BQ5 (Made in Germany)

Soundlumia Tube Sound Rating: 9.0/10 - Outstanding

Date codes: rX3 ‡2I (rX3 = EL84 Production Gen#3,  = Munich, 2 = 1962, I = September)

GM (Mutual Conductance) test result: 90%/88% of NOS/NEW

Silkscreen: 90% - 100%

Packaging: NEW white tube boxes

Professional Tube Testing

This set was tested and certified by RoeTest V11 tester with the following result: 

Tube 1: 

Measured transconductance (GM): 10.12 mA/V  - 90%  (100% = 11.30 mA/V)
Measured plate current (IA): 41.39 mA  - 86%  (100% = 48.0 mA)

Tube 2:

Measured transconductance (GM): 10 mA/V  - 88%  (100% = 11.30 mA/V)
Measured plate current (IA): 42.82 mA  - 89%  (100% = 48.0 mA)

NO shorts, leakage or gas. NO noise or microphonics.

Curve trace is also included in the original RoeTest report.
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