BRIMAR 12AT7 / ECC81 – Vintage Black Plate / Top Ring Getter Quad
NOS Matched Quad
High Emission
Black Plate
Top Ring Getter
High Emission
Black Plate
Top Ring Getter
Offering a rare, precision-matched quad (4 Pcs) of BRIMAR 12AT7 dual triodes, Serial Nos. 2887066, 2887014, 2887026, and 2887024. These Made in England tubes represent the pinnacle of British valve manufacturing, featuring Black Plates and a Top Ring Getter for superior thermal stability. This set is exceptionally strong, with several sections testing well above 100% of factory specifications. These units are New in White Boxes and have been laboratory characterized on the Amplitrex AT1000.
- Type: 12AT7 / ECC81 Brand: BRIMAR
- Condition: NOS in White Box Construction: Black Plate / Top Ring Getter
- Origin: Made in England Testing: Amplitrex AT1000
Laboratory Characterization: Tested against industry standard 12AT7 parameters (Ip=10, Gm=5500$). This quad exhibits extraordinary emission, with plate current reaching as high as 12.6 mAdc (126%).
⚠️ International Buyers: Custom duties and taxes are the responsibility of the buyer in their country.
| Sr. No. | Triode | Parameter Ip (mA) | Result Ip (mAdc) | Percentage Ip | Parameter Gm (uMhos) | Result Gm (uMhos) | Percentage Gm |
|---|---|---|---|---|---|---|---|
| 2887066 | T1 | 10 | 12.2 | 122.0% | 5500 | 6180 | 112.4% |
| T2 | 10 | 11.6 | 116.0% | 5500 | 6000 | 109.1% | |
| 2887014 | T1 | 10 | 12.2 | 122.0% | 5500 | 6500 | 118.2% |
| T2 | 10 | 12.6 | 126.0% | 5500 | 6200 | 112.7% | |
| 2887026 | T1 | 10 | 12.6 | 126.0% | 5500 | 6070 | 110.4% |
| T2 | 10 | 10.8 | 108.0% | 5500 | 6050 | 110.0% | |
| 2887024 | T1 | 10 | 11.0 | 110.0% | 5500 | 6000 | 109.1% |
| T2 | 10 | 11.4 | 114.0% | 5500 | 6030 | 109.6% |
✉️ For technical inquiries, please Email us at [email protected]
Whatsapp: +1 (630) 597-3966
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