SYLVANIA JAN-6SN7GT VT-231 – 2 PCS
GRADE: GOLD SERIES | LABORATORY VERIFIED NOS
Black BaseNew in Original Government Boxes
Made in USA
Amplitrex AT1000 Tested
Offered here is an exceptional vintage matched pair lot of 2 military-grade SYLVANIA JAN-6SN7GT VT-231 dual-triode audio valves, pristine and outstandingly preserved in their original tan government boxes. Made in the USA for military applications, these highly legendary and collectible audiophile tubes feature premium Black Plates and a solid Black Base configuration, renown for their superb transparency, deep soundstage, and ultra-low noise floor.
Each individual tube has been thoroughly analyzed and verified on our laboratory-grade Amplitrex AT1000 digital tube tester. Following the exact formatting layout verified in the comprehensive data table below details the full side-by-side factory specifications alongside the laboratory-measured results for both triode sections.
| Serial No. | Test Triode | Parameter Ip mAdc | Result Ip mAdc | % Ip | Parameter Gm uMhos | Result Gm uMhos | % Gm |
|---|---|---|---|---|---|---|---|
| 764065 | T1 | 9.0 | 7.8 | 86% | 2600 | 2530 | 97% |
| T2 | 9.0 | 7.6 | 84% | 2600 | 2600 | 100% | |
| 764080 | T1 | 9.0 | 6.2 | 68% | 2600 | 2530 | 97% |
| T2 | 9.0 | 7.2 | 80% | 2600 | 2620 | 100% |
Note: Custom duties and taxes are the responsibility of the buyer in their country.
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