Brimar ECC81 / 12AT7 NOS Matched Pair
NOS Matched Pair
New In White Box
Black Plate
Big Ring Getter
New In White Box
Black Plate
Big Ring Getter
Offering a premium matched pair of 2 pcs Brimar ECC81 (12AT7) dual triodes, Serial Nos. 4514001 and 4514003. These highly sought-after British valves feature vintage Black Plates, Double Mica construction, and the iconic Big Ring Getter. Both units are New Old Stock (NOS) provided in clean white protective boxes and have been fully characterized on the Amplitrex AT1000 Digital Tube Tester.
- Type: ECC81 / 12AT7 Brand: Brimar
- Condition: NOS in White Box Construction: Black Plate / Double Mica / Big Ring Getter
- Origin: Made in England Testing: Amplitrex AT1000
Laboratory Characterization: Tested against factory reference parameters (Ip=10.0, Gm=5500).
Performance: This pair exhibits excellent health and matching, with transconductance reaching up to 6410 uMhos (116% of spec).
Performance: This pair exhibits excellent health and matching, with transconductance reaching up to 6410 uMhos (116% of spec).
⚠️ 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 |
|---|---|---|---|---|---|---|---|
| 4514001 | T1 | 10.0 | 10.6 | 106% | 5500 | 6210 | 113% |
| T2 | 10.0 | 10.8 | 108% | 5500 | 6140 | 112% | |
| 4514003 | T1 | 10.0 | 11.0 | 110% | 5500 | 6410 | 116% |
| T2 | 10.0 | 8.6 | 86% | 5500 | 5600 | 102% |
✉️ For technical inquiries, please Email us
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