International 12AU7A / ECC82
VINTAGE BLACK PLATE | SOLID DISC GETTER | MADE IN USA | NOS SINGLE
Black Plate
Solid Disc Getter
Amplitrex AT1000
Up for sale is a premium vintage International Service Master 12AU7A / ECC82, precision-manufactured in the USA. This unit features the highly desirable Black Plate construction and a Solid Disc Getter, a combination legendary for deep, rich tonal character and exceptional vintage warmth.
Precision tested on the Amplitrex AT1000 digital laboratory tester, the results below utilize the Percentage Method against original factory design-center specifications (Ip = 10.5 mA / Gm = 2200 µMhos). This tube displays massive emission on Triode 1 and stable performance on Triode 2.
| Serial No. | Test Triode – T1/T2 | Parameter ip mAdc | Result ip mAdc | % Ip (Emission) | Parameter Gm uMhos | Result Gm uMhos | % Gm (Transc.) |
|---|---|---|---|---|---|---|---|
| #2188001 | Triode 1 | 10.5 | 15.5 | 147.6% | 2200 | 2500 | 113.6% |
| Triode 2 | 10.5 | 10.5 | 100.0% | 2200 | 2100 | 95.4% |
⚠️ International Buyers: Custom duties and taxes are the responsibility of the buyer in their country.
Custom duties and taxes are the responsibility of the buyer in their country.
Support: [email protected] Precision Verified — NOS Audio Tubes
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