HITACHI 7025 / 12AX7 – SINGLE PREAMP TUBE (1 PC)
Top Ring Getter
Grey Plate Construction
Clear Glass Envelope
Low-Noise Dual Triode 7025 / 12AX7
New in White Box
Amplitrex AT1000 Tested
Up for sale is a single (1 pc) premium vintage NOS Hitachi 7025 (premium low-noise 12AX7 / ECC83 equivalent) dual triode vacuum tube, supplied in an individual white box. Manufactured in Japan featuring a clear glass envelope, precision grey plate structures, and a top ring getter. Hitachi vintage tubes are globally respected for exceptional construction quality, ultra-low microphonics, and linear audio reproduction. An ideal high-grade upgrade or replacement preamp tube for high-end audio preamplifiers, guitar amp V1 stages, and phono stages.
This tube has 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: 1.2 mA / 1,600 uMhos) are detailed in the table below.
| Serial No. | Triode Section | Plate Current (Ip) | Mutual Conductance (uMhos) | ||||
|---|---|---|---|---|---|---|---|
| Ref Spec | Result | % Ip | Ref Spec | Result | % uMhos | ||
| SR.NO.5458001 | Section 1 (T1) | 1.2 mA | 0.6 mA | 50% | 1600 | 1200 | 75% |
| Section 2 (T2) | 1.2 mA | 0.6 mA | 50% | 1600 | 1300 | 81% | |
Technical Note: Custom duties and taxes are the responsibility of the buyer in their country.
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