Valvo
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Product Summary
Model: 1956/57 Valvo EL84 6BQ5 (Made in Germany)
Soundlumia Tube Sound Rating: 9.0/10 - Outstanding
Date codes:
rX3 D6K (rX3 = EL84 production gen #3, D = Hamburg, Germany, 6 = 1956, K = November)
rX3 D7E (rX3 = EL84 production gen #3, D = Hamburg, Germany, 7 = 1957, E = May)
GM (Mutual Conductance) test result: 79%/77% of NOS/NEW
Silkscreen: 90% - 100%
Packaging: New white box
Professional Tube Testing
Tube 1:
Measured transconductance (GM): 8.88 mA/V - 79% (100% = 11.30 mA/V)
Measured plate current (IA): 33.29 mA - 69% (100% = 48 mA)
Tube 2:
Measured transconductance (GM): 8.75 mA/V - 77% (100% = 11.30 mA/V)
Measured plate current (IA): 43.49 mA - 91% (100% = 48mA)
NO shorts, leakage or gas. NO noise or microphonics.
Curve trace is also included in the original RoeTest report.
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