Brimar 12AT7WA/ECC81 Matched Pair – Grey Plate Top Ring Getter
NOS Matched Pair
High-Reliability WA Spec
Grey Plate
Top Ring Getter
High-Reliability WA Spec
Grey Plate
Top Ring Getter
Offering a fine matched pair (2 Pcs) of Brimar 12AT7WA dual triodes, Serial Nos. 1338227 and 1338171. These premium British-made tubes are the high-reliability “WA” versions of the 12AT7/ECC81, featuring Grey Plates and Top Ring Getters. Known for their classic “British Sound”—characterized by a warm, detailed midrange—these tubes were manufactured in England and are highly sought after for high-end audio applications. Both units are supplied in New White Boxes and have been precision characterized on the Amplitrex AT1000.
- Type: 12AT7WA / ECC81 Brand: Brimar
- Condition: New in White Box Construction: Grey Plate / Top Ring Getter
- Origin: Made in England Testing: Amplitrex AT1000
Laboratory Characterization: Tested against factory reference parameters for 12AT7. Both tubes demonstrate excellent consistency, with tube 1338171 showing perfectly matched transconductance of 4300 uMhos across both triode sections.
⚠️ International Buyers: Custom duties and taxes are the responsibility of the buyer in their country.
| Sr. No. | Test Triode | Parameter Ip (mAdc) | Result Ip (mAdc) | Percentage Ip | Parameter Gm (uMhos) | Result Gm (uMhos) | Percentage Gm |
|---|---|---|---|---|---|---|---|
| 1338227 | T1 | 10.0 | 8.2 | 82% | 5500 | 4340 | 79% |
| T2 | 10.0 | 7.6 | 76% | 5500 | 4300 | 78% | |
| 1338171 | T1 | 10.0 | 7.2 | 72% | 5500 | 4300 | 78% |
| T2 | 10.0 | 7.6 | 76% | 5500 | 4300 | 78% |
✉️ For technical inquiries, please Email us at [email protected]
Whatsapp: +1 (630) 597-3966
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