Brimar 12AT7WA NOS Matched Pair – Ruggedized Special Quality
NOS Matched Pair
Special Quality (WA)
Grey Plate
Top Ring Getter
Special Quality (WA)
Grey Plate
Top Ring Getter
Offering a premium New Old Stock (NOS) matched pair of 2 Pcs Brimar 12AT7WA high-mu dual triodes, Serial Nos. 2503015 and 2503033. The “WA” designation indicates a ruggedized, military-grade specification of the standard 12AT7, designed for high reliability and low microphonics. These British-made specimens feature classic Grey Plates and a Ring Getter construction. Both units are supplied in New White Boxes and have been precision characterized on the Amplitrex AT1000.
- Type: 12AT7WA / ECC81 Brand: Brimar
- Condition: NOS in White Box Construction: Grey Plate / Ring Getter
- Origin: Made in England Testing: Amplitrex AT1000
Laboratory Characterization: Tested against factory reference parameters for 12AT7 (Ip=10.0, Gm=5500). This pair shows strong emission, with tube 2503033 reaching a mutual conductance.
⚠️ 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 |
|---|---|---|---|---|---|---|---|
| 2503015 | T1 | 10.0 | 7.3 | 73% | 5500 | 4270 | 78% |
| T2 | 10.0 | 9.0 | 90% | 5500 | 4860 | 88% | |
| 2503033 | T1 | 10.0 | 6.4 | 64% | 5500 | 4100 | 75% |
| T2 | 10.0 | 8.4 | 84% | 5500 | 4900 | 89% |
✉️ For technical inquiries, please Email us at [email protected]
Whatsapp: +1 (630) 597-3966
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