MULLARD ECC81 / 12AT7 — Matched Pair
Laboratory Verified
Made in Great Britain
Grey Plate
New In White Generic Box
Amplitrex AT1000 Tested
Offering a premium Matched Pair (2 Pcs) of Mullard ECC81 dual triodes, manufactured in Great Britain. These authentic New Old Stock (NOS) specimens feature the highly regarded Grey Plate construction and a rare Square Getter, sought after by audiophiles for their smooth, detailed sonic texture.
Both tubes have been meticulously screened on the Amplitrex AT1000 Advance Digital Tube Tester. Matching is provided via the percentage method against factory design standards ($Ip = 10.0$ mA / $Gm = 5500$ µMhos).
| Serial No. | Triode | Parameter Ip | Result Ip (mA) | % Ip | Parameter Gm | Result Gm (uMhos) | % Gm |
|---|---|---|---|---|---|---|---|
| 2786025 | T1 | 10.0 | 11.2 | 112% | 5500 | 4940 | 90% |
| T2 | 10.0 | 8.4 | 84% | 5500 | 4500 | 82% | |
| 2786033 | T1 | 10.0 | 8.4 | 84% | 5500 | 4570 | 83% |
| T2 | 10.0 | 9.2 | 92% | 5500 | 4900 | 89% |
About NOS Audio Tubes
We specialize in thoroughly tested and screened quality vacuum tubes, serving the industry since the 1970s. Our massive inventory of approximately 300,000 valves is maintained with professional calibration equipment including the Amplitrex AT1000, Hickok 752a, and AVO Type 160.
Notice: Custom duties/taxes are the buyer’s responsibility. For addresses in extended delivery areas, please confirm your order before checkout to verify potential surcharges.
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