Sylvania 6V6 — Matched Quad
GRADE: GOLD SERIES | LABORATORY VERIFIED | NOS/VINTAGE STOCK
NOS/Vintage USA
Matched for High-Fidelity
Amplitrex AT1000 Digital Testing
This listing is for a precision-matched quad of vintage Sylvania 6V6 beam power tubes in the classic Black Metal envelope. These American-made valves are renowned for their exceptional internal shielding and military-grade durability, providing a low-noise floor and a focused, articulate response ideal for critical audio applications.
Each tube has been individually analyzed on the Amplitrex AT1000 digital tester. Following our Percentage Method, the results below show how each tube performs relative to the 100% factory design-center specifications for this tube type (Ip = 45.0mA / Gm = 4100 µMhos).
| Serial No. | Parameter Ip | Result Ip | % Ip | Parameter Gm | Result Gm | % Gm |
|---|---|---|---|---|---|---|
| #2740006 | 45.0 | 38.2 | 85% | 4100 | 3930 | 96% |
| #2740018 | 45.0 | 38.0 | 84% | 4100 | 3920 | 96% |
| #2740033 | 45.0 | 37.6 | 84% | 4100 | 3990 | 97% |
| #2740054 | 45.0 | 40.4 | 90% | 4100 | 3980 | 97% |
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