SIEMENS ECC81 / 12AT7 — Vintage German Precision Pair
Grade: NOS Series
Laboratory Verified
Made in Germany
Laboratory Verified
Made in Germany
O-Ring Getter
Gray Plates
Copper Grid Posts
Amplitrex AT1000 Precision Tested
Gray Plates
Copper Grid Posts
Amplitrex AT1000 Precision Tested
Presenting a meticulously matched pair of Siemens ECC81 / 12AT7 vacuum tubes, engineered in Germany. Known for their analytical detail, low noise floor, and superb frequency extension, these Ring Getter specimens with Gray Plates represent the pinnacle of European 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. | Triode Section | 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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