ULTRON ECC81 / 12AT7 — High-Performance Dual Triode
Laboratory Verified
Dual Triode Construction
Gold Label Branding
Amplitrex AT1000 Verified
Available for purchase is a single (1 piece) premium Ultron ECC81 / 12AT7 dual triode tube. This specific unit features the highly efficient Top Ring Getter and is branded under the prestigious Ultron SQ (Special Quality) line, known for low noise and high reliability in critical audio stages.
The tube has been fully tested on the Amplitrex AT1000 professional tube analyzer. It demonstrates excellent balance between both triode sections, making it ideal for phase inverter or driver positions in high-fidelity amplifiers.
| Serial No. | Triode Section | Parameter Ip mAdc | Result Ip mAdc | % Ip | Parameter Gm uMhos | Result Gm uMhos | % Gm |
|---|---|---|---|---|---|---|---|
| #4532001 | (T1) | 10.0 | 15.4 | 154% | 5500 | 7200 | 131% |
| (T2) | 10.0 | 15.2 | 152% | 5500 | 7150 | 130% |
Technical Note: Percentage calculations are based on standard NOS (New Old Stock) factory specifications for the 12AT7 ($I_p$ = 10.0mA, $G_m$ = 5,500 uMhos). These results indicate exceptionally high emission and gain, significantly exceeding nominal ratings.
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