SIEMENS ECC81 / 12AT7 — Vintage German
Laboratory Verified
Made in Germany
Made in Germany
Top Ring Getter
Gray Plates
Amplitrex AT1000 Precision Tested
Gray Plates
Amplitrex AT1000 Precision Tested
Presenting a meticulously 2 pcs of Siemens ECC81 / 12AT7 vacuum tubes, engineered in Germany. Known for their analytical detail, low noise floor, and superb frequency extension, these Top Ring Getter specimens with Grey Plates represent the pinnacle of tube manufacturing.
Both units have been professionally characterized on the Amplitrex AT1000 digital laboratory tester. We utilize our standardized Percentage Method below to show exactly how these vintage tubes perform relative to their original factory 100% design-center specifications.
| Serial No. | Test Triode | Parameter Ip mAdc | Result Ip mAdc | % Ip | Parameter Gm uMhos | Result Gm uMhos | % Gm |
|---|---|---|---|---|---|---|---|
| 4879001 | Section 1 (T1) | 10.0 | 6.4 | 64% | 5500 | 3660 | 66% |
| Section 2 (T2) | 10.0 | 6.7 | 67% | 5500 | 4400 | 80% | |
| 4879002 | Section 1 (T1) | 10.0 | 2.6 | 26% | 5500 | 1590 | 29% |
| Section 2 (T2) | 10.0 | 3.0 | 30% | 5500 | 1910 | 35% |
Technical Note: Custom duties and taxes are the responsibility of the buyer in their country.
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Precision Verified — NOS Audio Tubes
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