SYLVANIA 12AT7 / ECC81 — Vintage Made in USA
Laboratory Verified
Made in USA
Black Plate
New in Original Box
Amplitrex AT1000 Tested
Up for sale is a matched pair of authentic Sylvania 12AT7 / ECC81 vacuum tubes, manufactured in the USA. These tubes feature the classic Top Ring Getter & Black Plate design, renowned for delivering a detailed and dynamic soundstage in high-end audio applications. Which comes in new in original box
Each tube has been individually analyzed using the Amplitrex AT1000 digital tester. This pair exhibits strong emission and transconductance levels, making them an ideal choice for critical listening environments and professional studio equipment.
| Serial No. | Test Triode | Parameter Ip mAdc | Result Ip mAdc | % Ip mAdc | Parameter Gm uMhos | Result Gm uMhos | % Gm uMhos |
|---|---|---|---|---|---|---|---|
| 2085002 | T1 | 10.0 | 10.0 | 100% | 5500 | 5700 | 103.6% |
| T2 | 10.0 | 11.4 | 114% | 5500 | 5660 | 102.9% | |
| 2085003 | T1 | 10.0 | 9.8 | 98% | 5500 | 5200 | 94.5% |
| T2 | 10.0 | 10.2 | 102% | 5500 | 5470 | 99.4% |
Technical Note: Percentage calculations are based on Amplitrex standard factory parameters for the 12AT7/ECC81 family (Ip = 10.0mA, Gm = 5,500 uMhos).
Note: Custom Duties and Taxes are the Responsibility of the Buyer in their Country
Reviews
There are no reviews yet