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Mullard

1x Mullard Z729 = EF86 O-getter - G.E.C. Label - Mitcham 1961 8Y0 - Strong

1x Mullard Z729 = EF86 O-getter - G.E.C. Label - Mitcham 1961 8Y0 - Strong

Regular price $124.40 USD
Regular price Sale price $124.40 USD
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Sound Sample:

Product Summary

Model: Mullard Z729 EF86 (Made in United Kingdom)

Soundlumia Tube Sound Rating: 9.0/10 - Outstanding

Lush and warm vintage tone, intimate vocals, wide sound stage with layered details

Date code(s): BY0 R1?4 (BY0 = EF86, R = Mitcham, 1 = 1961, 4 = Week 4 of production month)

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

Silkscreen: 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): 1.76 mA/V - 88% (100% = 2.00 mA/V)
Measured plate current(IA): 2.725 mA  - 91% (100% = 3 mA)

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

Curve trace is also included in the original RoeTest report.

 

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