GE 12AT7 / ECC81 – 2 PCS
GRADE: GOLD SERIES | LABORATORY VERIFIED NOS
Top Ring GetterNew in Original Boxes
Made in USA
Amplitrex AT1000 Tested
Offered here is a stellar vintage matched pair lot of 2 premium GE (General Electric) 12AT7 / ECC81 dual-triode audio valves, pristine and clean in their classic original orange and grey vintage boxes. Made in the USA, these highly reliable and rugged vintage tubes feature high-grade Grey Plates and a precision Top Ring Getter configuration, proudly displaying the iconic original white General Electric script glass decals.
As captured in each individual tube has been rigorously checked and verified on a laboratory-grade Amplitrex AT1000 digital tube analyzer. Following the exact formatting layout verified in the comprehensive data table below provides the full side-by-side factory parameters alongside the laboratory-measured test results for both triode sections.
| Serial No. | Test Triode | Parameter Ip mAdc | Result Ip mAdc | % Ip | Parameter Gm uMhos | Result Gm uMhos | % Gm |
|---|---|---|---|---|---|---|---|
| 2014023 | T1 | 10.0 | 8.2 | 82% | 5500 | 4940 | 90% |
| T2 | 10.0 | 6.0 | 60% | 5500 | 5870 | 107% | |
| 2014058 | T1 | 10.0 | 7.4 | 74% | 5500 | 4910 | 89% |
| T2 | 10.0 | 8.6 | 86% | 5500 | 5650 | 103% |
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