SIEMENS ECC81 / 12AT7 — Vintage Germany Pair
Grade: Gold Series
Laboratory Verified
Made in Germany
Laboratory Verified
Made in Germany
Top Ring Getter
Internal Shielding
Double Mica
Amplitrex AT1000 Tested
Internal Shielding
Double Mica
Amplitrex AT1000 Tested
Available now is a pair of authentic vintage Siemens ECC81 / 12AT7 vacuum tubes, manufactured with precision in Germany. These desirable specimens feature Top Ring Getters and are highly sought after by audiophiles for their low noise floor and superior transparency in preamplifier circuits.
Both tubes have been thoroughly analyzed on a laboratory-grade Amplitrex AT1000 tester. This set offers excellent electrical performance, ensuring reliable operation in high-fidelity audio systems.
| Serial No. | Triode Section | Parameter Ip mAdc | Result Ip mAdc | % Ip | Parameter Gm uMhos | Result Gm uMhos | % Gm |
|---|---|---|---|---|---|---|---|
| 1972095 | Section 1 (T1) | 10.0 | 6.8 | 68% | 5500 | 4350 | 79% |
| Section 2 (T2) | 10.0 | 9.0 | 90% | 5500 | 5520 | 100% | |
| 1972094 | Section 1 (T1) | 10.0 | 6.4 | 64% | 5500 | 4580 | 83% |
| Section 2 (T2) | 10.0 | 6.8 | 68% | 5500 | 4890 | 88% |
Technical Note: Percentage calculations are derived from standard Amplitrex 12AT7/ECC81 parameters (Ip = 10.0mA, Gm = 5,500 uMhos).
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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