LINLAI UA-12AU7 / ECC82 – MATCHED PREAMP TUBE PAIR (2 PCS)
Grey Plate Construction
Premium Golden Pins
Top Ring Getter
Made in China
Dual Triode UA-12AU7 / ECC82
New in Original Box
Amplitrex AT1000 Tested
Up for sale is a matched pair (2 pcs) of high-end Linlai UA-12AU7 dual triode vacuum tubes, complete with their original factory boxes[cite: 13]. Built with precision grey plate structures, top ring getters, and corrosion-resistant golden pins for superior electrical contact[cite: 13], Linlai UA-series tubes are globally celebrated for outstanding linearity, low noise performance, rich tonal balance, and immersive soundstage imaging. An excellent high-grade upgrade or replacement preamp tube for audiophile preamplifiers, DAC buffer stages, and tube headphone amplifiers.
Both tubes have been fully tested on a precision Amplitrex AT1000 tube tester[cite: 13]. Measured Plate Current (Ip in mA) and Mutual Conductance (uMhos) alongside percentage performance ratings relative to nominal factory reference specs (Reference: 10.5 mA / 2,200 uMhos) are detailed in the table below[cite: 13].
| Serial No. | Triode Section | Plate Current (Ip) | Mutual Conductance (uMhos) | ||||
|---|---|---|---|---|---|---|---|
| Ref Spec | Result | % Ip | Ref Spec | Result | % uMhos | ||
| SR.NO.5482001 | Section 1 (T1) | 10.5 mA | 12.2 mA | 116% | 2200 | 3400 | 155% |
| Section 2 (T2) | 10.5 mA | 9.2 mA | 88% | 2200 | 3000 | 136% | |
| SR.NO.5482002 | Section 1 (T1) | 10.5 mA | 11.4 mA | 109% | 2200 | 3100 | 141% |
| Section 2 (T2) | 10.5 mA | 9.0 mA | 86% | 2200 | 3100 | 141% | |
Technical Note: Custom duties and taxes are the responsibility of the buyer in their country.
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