BRIMAR ECC81 / 12AT7 — Vintage Black Plate
Laboratory Verified
Made in England
Black Plate Construction
Dual Triode
Amplitrex AT1000 Verified
Available for purchase is a single (1 piece) highly desirable Brimar ECC81 / 12AT7, made in England. This unit features the legendary Black Plate construction and a Top Ring Getter, features prized by audiophiles for their superior harmonic richness and low-noise floor.
This tube has been rigorously analyzed on the Amplitrex AT1000 professional tester. The results demonstrate the authentic vintage character of this British-made classic, ready for critical listening applications in high-fidelity audio gear.
| Serial No. | Triode Section | Parameter Ip mAdc | Result Ip mAdc | % Ip | Parameter Gm uMhos | Result Gm uMhos | % Gm |
|---|---|---|---|---|---|---|---|
| 4507001 | Section 1 (T1) | 10.0 | 3.6 | 36% | 5500 | 2560 | 46.5% |
| Section 2 (T2) | 10.0 | 5.0 | 50% | 5500 | 3460 | 62.9% |
Technical Note: Percentage calculations are based on standard factory specifications for the 12AT7 (Ip = 10.0mA, Gm = 5,500 uMhos). This specimen is a genuine vintage England-manufactured Brimar with classic black plates.
Note: Custom duties and taxes are the responsibility of the buyer in their country.
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