Sylvania 12AT7WA/ECC81 – Grey Plate / Big Ring Getter Military Grade
NOS Matched Pair
Military Grade
Grey Plate
Big Ring Getter
Military Grade
Grey Plate
Big Ring Getter
Offering a matched pair (2 Pcs) of Sylvania 12AT7WA dual triodes, Serial Nos. 2340001 and 2340009. These Made in USA specimens feature Grey Plates and the distinctive Big Ring Getter. As “WA” military-grade variants, these tubes were engineered for high reliability, low noise, and strictly controlled electrical tolerances. These units are New in White Boxes and have been laboratory characterized on the Amplitrex AT1000.
- Type: 12AT7WA / ECC81 Brand: Sylvania
- Condition: New in White Box Construction: Grey Plate / Big Ring Getter
- Origin: Made in USA Testing: Amplitrex AT1000
Laboratory Characterization: Tested against industry standard 12AT7 parameters . Both specimens exhibit excellent health and tight matching, with Serial 2340001 reaching a transconductance of 5,430 uMhos.
⚠️ 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 |
|---|---|---|---|---|---|---|---|
| 2340001 | T1 | 10 | 9.4 | 94.0% | 5500 | 5430 | 98.7% |
| T2 | 10 | 8.8 | 88.0% | 5500 | 5300 | 96.4% | |
| 2340009 | T1 | 10 | 8.8 | 88.0% | 5500 | 5370 | 97.6% |
| T2 | 10 | 8.8 | 88.0% | 5500 | 5300 | 96.4% |
✉️ For technical inquiries, please Email us at [email protected]
Whatsapp: +1 (630) 597-3966
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