HITACHI 6267 / EF86 – MATCHED PAIR (2 PCS)
Made in Japan
Triple Mica
Silver Plate / Shield
Top Square Getter
Low-Noise Audio Pentode 6267 / EF86
New in White Box
Amplitrex AT1000 Tested
Up for sale is a closely matched pair (2 pcs) of vintage NOS Hitachi 6267 / EF86 low-noise audio pentode vacuum tubes, supplied in individual white boxes. Precision-built in Japan, these rugged valves feature heavy-duty triple mica internal spacers, shiny silver plate shielding structures, and top square getters. Renowned among audiophiles and studio engineers for superior mechanical stability, ultra-low microphonics, dead-silent noise floor, and transparent dynamic clarity. An exceptional matched pair upgrade or replacement for Vox AC15/AC30 V1 channels, high-end stereo preamplifiers, and vintage studio condenser microphone preamps.
Both tubes have been fully tested on a precision Amplitrex AT1000 tube tester. Measured Plate Current (Ip in mA) and Mutual Conductance (uMhos) alongside percentage performance ratings relative to nominal factory reference specs (Reference: 3.0 mA / 1,800 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:5506001 | Single Pentode | 3.0 mA | 2.2 mA | 73% | 1800 | 1800 | 100% |
| SR.NO:5506002 | Single Pentode | 3.0 mA | 2.4 mA | 80% | 1800 | 1860 | 103% |
Technical Note: Custom duties and taxes are the responsibility of the buyer in their country.
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