RUSSIAN 6H9C (6SL7GT) — 8 Pcs
Laboratory Verified
Made in Russia
Black Base
Bottom Leaf Getter
Amplitrex AT1000 Tested
Available for purchase is a rare, laboratory (8 Pcs) of Russian 6H9C twin triodes, a high-quality equivalent to the Western 6SL7GT. These premium vintage valves feature the desirable Black Crimped Plate construction, Black Bases, and Bottom Leaf Getters. Known for their low microphonics and excellent linearity, these tubes are ideal for high-end audio preamplification and phased inverter circuits.
Each tube in this set has been rigorously screened on the Amplitrex AT1000. Test results are presented below as a percentage of original factory specifications for the 6H9C (Ip = 2.3 mA / Gm = 1600 µMhos).
| Serial No. | Test Triode | Parameter Ip mAdc | Result Ip mAdc | % Ip | Parameter Gm uMhos | Result Gm uMhos | % Gm |
|---|---|---|---|---|---|---|---|
| 2896084 | T1 | 2.3 | 2.3 | 100% | 1600 | 1800 | 112% |
| T2 | 2.3 | 2.4 | 104% | 1600 | 1800 | 112% | |
| 2896039 | T1 | 2.3 | 2.7 | 117% | 1600 | 1800 | 112% |
| T2 | 2.3 | 2.7 | 117% | 1600 | 1800 | 112% | |
| 2896052 | T1 | 2.3 | 2.4 | 104% | 1600 | 1800 | 112% |
| T2 | 2.3 | 2.4 | 104% | 1600 | 1800 | 112% | |
| 2896095 | T1 | 2.3 | 2.5 | 108% | 1600 | 1800 | 112% |
| T2 | 2.3 | 2.5 | 108% | 1600 | 1800 | 112% | |
| 2896082 | T1 | 2.3 | 2.6 | 113% | 1600 | 1800 | 112% |
| T2 | 2.3 | 2.7 | 117% | 1600 | 1800 | 112% | |
| 2896096 | T1 | 2.3 | 2.7 | 117% | 1600 | 1800 | 112% |
| T2 | 2.3 | 2.6 | 113% | 1600 | 1800 | 112% | |
| 2896070 | T1 | 2.3 | 2.4 | 104% | 1600 | 1800 | 112% |
| T2 | 2.3 | 2.6 | 113% | 1600 | 1800 | 112% | |
| 2896049 | T1 | 2.3 | 2.2 | 96% | 1600 | 1800 | 112% |
| T2 | 2.3 | 2.2 | 96% | 1600 | 1800 | 112% |
About NOS Audio Tubes
Based in Mumbai, India, we are professional suppliers of high-quality vintage vacuum tubes with over 50 years of industry experience. Every tube in our 300,000-valve inventory is precision-verified on industrial equipment like the Amplitrex AT1000.
International Buyer: Custom duties and taxes are the buyer’s responsibility. For shipping to extended delivery zones, please verify the destination before final checkout.
NOTE: WE HAVE MORE THAN 7000 PCS
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