LINLAI 300B – MATCHED POWER TRIODE PAIR (2 PCS)
Black Plate Construction
Bottom Double Disc Getter
Made in China
Directly Heated Power Triode 300B
New in Original Box
Amplitrex AT1000 Tested
Up for sale is a matched pair (2 pcs) of premier Linlai 300B directly heated power triode vacuum tubes, complete with their original factory boxes[cite: 16]. Built with high-purity black plate structures, classic globe-style glass envelopes, sturdy bases, and bottom double disc getters[cite: 16], Linlai 300B tubes represent exceptional modern audio tube engineering. Renowned by single-ended triode (SET) amp enthusiasts and audiophiles worldwide for lush midrange liquidity, sweet delicate highs, and natural organic dynamics.
Both tubes have been fully tested on a precision Amplitrex AT1000 tube tester[cite: 16]. Measured Plate Current (Ip in mA) and Mutual Conductance (uMhos) alongside percentage performance ratings relative to nominal factory reference specs (Reference: 60.0 mA / 5,500 uMhos) are detailed in the table below.
| Serial No. | Tube Section | Plate Current (Ip) | Mutual Conductance (uMhos) | ||||
|---|---|---|---|---|---|---|---|
| Ref Spec | Result | % Ip | Ref Spec | Result | % uMhos | ||
| SR.NO:5487001 | Single Power Triode | 60.0 mA | 76.4 mA | 127% | 5500 | 5600 | 102% |
| SR.NO:5487006 | Single Power Triode | 60.0 mA | 72.0 mA | 120% | 5500 | 5510 | 100% |
Technical Note: Custom duties and taxes are the responsibility of the buyer in their country.
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