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Soundlumia

2x Mullard EL34 6CA7 OO Getter Orig. Box - Siemens Label - Blackburn '65/'66 Xf2

2x Mullard EL34 6CA7 OO Getter Orig. Box - Siemens Label - Blackburn '65/'66 Xf2

$399.75 USD
$399.75 USD
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Product Summary

Model: 1965/66 Mullard EL34 6CA7 (Made in Gt. Britain) 

Soundlumia Tube Sound Rating: 9.5/10 - Exceptional

Date codes: 

Xf2 B5L1 (B = Blackburn, GB, 5 = 1965, L = December, 1 = Week #1 of the production month)

Xf2 B6L2 (B = Blackburn, GB, 5 = 1965, L = December, 2 = Week #2 of the production month)

GM (Mutual Conductance) test result: 90%/101% of NOS/NEW

Silkscreen: 90% - 100%

Packaging: NEW white tube boxes.

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): 9.88 mA/V - 90% (100% = 11.00 mA/V)
Measured plate current(IA): 70.04 mA  - 70% (100% = 100 mA)

Tube 2:

Measured transconductance(GM): 11.13 mA/V - 101% (100% = 11.00 mA/V)
Measured plate current(IA): 93.14 mA  - 93% (100% = 100 mA)

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

Curve trace is also included in the original RoeTest report.

Packaging

NEW reproduction Mullard tube boxes.

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