Siemens ECC83 / 12AX7 — Quad Set
NOS GERMANY | GREY PLATE | LABORATORY VERIFIED
Grey Plate Construction
Top Ring Getter
Amplitrex Verified
Available for the discerning audiophile is a laboratory-verified quad of vintage Siemens ECC83 dual triodes. Renowned for their German engineering precision, these Grey Plate valves with Top Ring Getters offer unparalleled clarity and a neutral, transparent sonic profile.
Each unit has been rigorously tested on the Amplitrex AT1000. Following the Percentage Method, the data below illustrates performance relative to factory design-center specifications (Ip = 1.2 mA / Gm = 1600 µMhos).
| Serial No. | Test Triode – T1/T2 | Parametre 1p mAdc | Result 1p mAdc | % Ip | Parametre Gm uMhos | Result Gm uMhos | % Gm |
|---|---|---|---|---|---|---|---|
| #1205013 | T1 | 1.2 | 0.7 | 58.3% | 1600 | 1400 | 87.5% |
| T2 | 1.2 | 0.6 | 50.0% | 1600 | 1300 | 81.3% | |
| #1205007 | T1 | 1.2 | 0.8 | 66.7% | 1600 | 1400 | 87.5% |
| T2 | 1.2 | 0.7 | 58.3% | 1600 | 1400 | 87.5% | |
| #1205014 | T1 | 1.2 | 0.6 | 50.0% | 1600 | 1300 | 81.3% |
| T2 | 1.2 | 0.7 | 58.3% | 1600 | 1400 | 87.5% | |
| #1205005 | T1 | 1.2 | 0.7 | 58.3% | 1600 | 1300 | 81.3% |
| T2 | 1.2 | 0.7 | 58.3% | 1600 | 1360 | 85.0% |
⚠️ Note: Custom duties and taxes are the responsibility of the buyer in their country.
Note: 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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