6H8C / 6SN7GT Matched Quad
BLACK BASE | BOTTOM CUP GETTER | MADE IN USSR | NOS QUALITY
Made in USSR
Black Base
Up for sale is a premium matched quad (4 pieces) of 6H8C / 6SN7GT dual triodes. These are genuine Soviet Made specimens featuring a classic Black Base and Bottom Cup Getter. As the high-durability USSR equivalent to the 6SN7GT, these tubes are celebrated for their musicality and structural longevity in high-end audio gear.
Precision tested on our Amplitrex AT1000 digital laboratory system, the results below utilize the Percentage Method against original factory design-center specifications (Ip = 9.0 mA / Gm = 2600 µMhos). This quad shows remarkable consistency in transconductance across all sections.
| Serial No. | Section | Parameter Ip mAdc | Result Ip mAdc | % Ip | Parameter Gm uMhos | Result Gm uMhos | % Gm |
|---|---|---|---|---|---|---|---|
| 1052093 | Triode 1 | 9.0 | 6.8 | 75.6% | 2600 | 2510 | 96.5% |
| Triode 2 | 9.0 | 6.6 | 73.3% | 2600 | 2500 | 96.2% | |
| 1052109 | Triode 1 | 9.0 | 6.8 | 75.6% | 2600 | 2500 | 96.2% |
| Triode 2 | 9.0 | 9.2 | 102.2% | 2600 | 2500 | 96.2% | |
| 1052105 | Triode 1 | 9.0 | 5.8 | 64.4% | 2600 | 2500 | 96.2% |
| Triode 2 | 9.0 | 7.0 | 77.8% | 2600 | 2500 | 96.2% | |
| 1052114 | Triode 1 | 9.0 | 6.0 | 66.7% | 2600 | 2500 | 96.2% |
| Triode 2 | 9.0 | 6.8 | 75.6% | 2600 | 2490 | 95.8% |
⚠️ International Buyers: Custom duties and taxes are the responsibility of the buyer in their country.
NOTE: WE HAVE MORE THAN 1500 PCS
Quality Verified Since 1970
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