Skip to product information
1 of 6

Siemens

2x Siemens Valvo EF86 6267 Mesh Plates Matching Codes - Hamburg 1960 8Y1 - NOS

2x Siemens Valvo EF86 6267 Mesh Plates Matching Codes - Hamburg 1960 8Y1 - NOS

Regular price $172.00 USD
Regular price Sale price $172.00 USD
Sale Sold out
Shipping calculated at checkout.
Product Summary

Model: 1960 Siemens Valvo Hamburg EF86 6267 Mesh Plates (Made in Germany)

Soundlumia Tube Sound Rating9.0/10 - Excellent

1960s Hamburg production - The real King of Bass - Unparalleled musicality with great substance and weight in midrange presentation

Date codes: 8Y2 D0D (8Y2 = EF86 production gen #2, D = Hamburg, 0 = 1960, D = April)

GM (Mutual Conductance) test result: 107%/92% NOS

Silkscreen: 95% - 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): 2.14 mA/V  - 107%  (100% = 2.0 mA/V)
Measured plate current (IA): 3.062 mA  - 102%  (100% = 3.0 mA)

Tube 2: 

Measured transconductance (GM): 1.84 mA/V  - 92%  (100% = 2.0 mA/V)
Measured plate current (IA): 2.627mA  - 88%  (100% = 3.0 mA)

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

Curve trace is also included in the original RoeTest report.
View full details