RCA 7025 / 12AX7 – MATCHED PAIR (2 PCS)
Top Ring Getter
Black Plate
Made in USA
Low-Noise 7025 / 12AX7 / ECC83
New in White Box
Amplitrex AT1000 Tested
Up for sale is a matched pair (2 pcs) of genuine vintage NOS RCA 7025 dual triode vacuum tubes, manufactured in the USA and supplied in individual white boxes. The 7025 is the premier low-noise, low-microphonic industrial/upgrade version of the standard 12AX7 / ECC83 dual triode. Featuring robust black plate structures and top ring getters, these tubes deliver exceptional clarity, a silent background noise floor, and rich American tone. An ideal upgrade for high-end audio preamplifiers, Hi-Fi gear, and guitar amp input stages.
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: 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:2956019 | Triode 1 | 1.2 mA | 0.4 mA | 33% | 1600 | 1100 | 69% |
| Triode 2 | 1.2 mA | 0.5 mA | 42% | 1600 | 1100 | 69% | |
| SR.NO:2956008 | Triode 1 | 1.2 mA | 0.7 mA | 58% | 1600 | 1300 | 81% |
| Triode 2 | 1.2 mA | 0.6 mA | 50% | 1600 | 1200 | 75% | |
Technical Note: Custom duties and taxes are the responsibility of the buyer in their country.
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