MULLARD EF39 – 4 PCS
GRADE: GOLD SERIES | LABORATORY VERIFIED
Top Cap PentodeBritish Made
Amplitrex AT1000
Offered here is a premier matched quad lot of 4 vintage MULLARD EF39 pentodes, featuring the iconic striking Red Coated Glass structure and Top Cap construction. These legendary British classic valves are highly sought after for their robust performance and historic signature tone.
This batch has been thoroughly analyzed and verified on the Amplitrex AT1000 digital tester. Following our precise percentage evaluation, the metrics below display how each individual valve performs relative to the 100% factory specifications (Ia = 6.0mA / mA/V = 2.2).
| Serial No. | Section | Parameter Ia | Result Ia | % Ia | Parameter mA/V | Result mA/V | % mA/V |
|---|---|---|---|---|---|---|---|
| 2751001 | Pentode | 6.0 | 6.8 | 113% | 2.2 | 2.5 | 114% |
| 2751002 | Pentode | 6.0 | 7.1 | 118% | 2.2 | 2.7 | 123% |
| 2751003 | Pentode | 6.0 | 7.6 | 127% | 2.2 | 2.6 | 118% |
| 2751004 | Pentode | 6.0 | 7.6 | 127% | 2.2 | 2.8 | 127% |
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