SIEMENS ECC81 — Vintage German Matched Pair
Laboratory Verified
Made in Germany
Authentic “Made In Germany” Print
ECC81 / 12AT7 Family
Amplitrex AT1000 Verified
Up for sale is a high-performance matched pair (2 pieces) of authentic Siemens ECC81 vacuum tubes, precision-crafted in Germany. These premium specimens feature the classic Top Ring Getter construction and are celebrated for their analytical clarity, low noise, and robust German engineering.
Each tube has been meticulously tested and matched on a professional Amplitrex AT1000 analyzer. Known for delivering a detailed and transparent soundstage, these Siemens valves are an ideal choice for audiophiles seeking to optimize high-fidelity preamplifiers and driver circuits.
| Serial No. | Triode Section | Parameter Ip mAdc | Result Ip mAdc | % Ip | Parameter Gm uMhos | Result Gm uMhos | % Gm |
|---|---|---|---|---|---|---|---|
| #1154001 | Section 1 (T1) | 10.0 | 7.8 | 78% | 5500 | 5150 | 93.6% |
| Section 2 (T2) | 10.0 | 8.0 | 80% | 5500 | 5300 | 96.3% | |
| #1154002 | Section 1 (T1) | 10.0 | 6.0 | 60% | 5500 | 3780 | 68.7% |
| Section 2 (T2) | 10.0 | 7.4 | 74% | 5500 | 4210 | 76.5% |
Technical Note: Percentage calculations are based on Amplitrex standard factory parameters for the ECC81 family (Ip = 10.0mA, Gm = 5,500 uMhos).
Matching Data: Comprehensive measurements including Mu and Plate Resistance (RP) are provided for each section.
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