Valvo
Regular price
$108.00 USD
Regular price
Sale price
$108.00 USD
Unit price
/
per
Couldn't load pickup availability
Product Summary
Model: 1957 Valvo Hamburg EF86 6267 Mesh Plates (Made in Germany)
Soundlumia Tube Sound Rating: 9.0/10 - Excellent
1950s Hamburg production - The real King of Bass - Unparalleled musicality with great substance and weight in midrange presentation
Date codes:
8Y1 D7D (8Y1 = EF86 production gen #1, D = Hamburg, 7 = 1957, D = April)
8Y1 D7J (8Y1 = EF86 production gen #1, D = Hamburg, 7 = 1957, J = October)
GM (Mutual Conductance) test result: 47%/61% NOS
Silkscreen: 95% - 100%
Packaging: New white tube boxes.
Professional Tube Testing
Tube 1:
Measured transconductance(GM): 0.94 mA/V - 47% (100% = 2.00 mA/V)
Measured plate current(IA): 1.532 mA - 51% (100% = 3 mA)
Tube 2:
Measured transconductance(GM): 1.22 mA/V - 61% (100% = 2.00 mA/V)
Measured plate current(IA): 1.765 mA - 59% (100% = 3 mA)
NO shorts, leakage or gas. NO noise or microphonics.
Curve trace is also included in the original RoeTest report.
Share
View full details
