BRIMAR ECC81/12AT7 – MATCHED PAIR (2 PCS)
GRADE: PLATINUM SERIES | VINTAGE ENGLAND MANUFACTURE
Brimar Brand Label
ECC81 / 12AT7 Specification
Black Plate
Top Ring Getter
New in Original Box
Amplitrex AT1000 Tested
Up for sale is a strong, matched pair (2 Pcs) of vintage NOS Brimar ECC81 / 12AT7 dual triode audio tubes, complete in their original factory boxes. Made in England, these sought-after British valves feature highly prized black plate construction and a top ring getter design. Renowned by audiophiles for their rich tone, smooth high-frequency response, and exceptional clarity in high-end audio preamplifiers, phase inverters, and driver stages.
Both tubes have been thoroughly tested on an Amplitrex AT1000 automated valve tester at nominal reference settings. Plate Current (Ip) and Transconductance (uMhos) measurements alongside percentage performance ratings relative to standard factory specs are detailed in the table below.
| Serial No. | Tube Section | Plate Current (Ip) | Transconductance (uMhos) | ||||
|---|---|---|---|---|---|---|---|
| Ref Spec | Result | % Ip | Ref Spec | Result | % Gm | ||
| SR.NO. 1260001 | Triode 1 | 10.0 mA | 11.0 mA | 110% | 5500 uMhos | 6370 uMhos | 116% |
| Triode 2 | 10.0 mA | 12.4 mA | 124% | 5500 uMhos | 6580 uMhos | 120% | |
| SR.NO. 1260004 | Triode 1 | 10.0 mA | 12.6 mA | 126% | 5500 uMhos | 6600 uMhos | 120% |
| Triode 2 | 10.0 mA | 11.8 mA | 118% | 5500 uMhos | 6670 uMhos | 121% | |
Technical Note: Custom duties and taxes are the responsibility of the buyer in their country.
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