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RCA

7025 12AX7 RCA Clear Top Long Gray Plates Side D Getter Tested Tube Made in USA '60s

7025 12AX7 RCA Clear Top Long Gray Plates Side D Getter Tested Tube Made in USA '60s

€79,50 EUR
€79,50 EUR
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7025 12AX7 RCA Clear Top Long Gray Plates Side D Getter Tested Tube Made in USA '60s

Description:

The 7025 RCA Clear Top , made in the United States in the 1960s and branded for THE FISHER , are one of the most sought-after versions of this preamplifier tube. Featuring long gray plates and a side D-getter , they are distinguished by their unique “clear top” construction that leaves the internal grille visible, a detail appreciated by collectors and enthusiasts.
Offered as a single configuration, it represents an ideal choice both for those wishing to restore vintage THE FISHER equipment, and for those seeking a carefully selected valve for high-quality hi-fi and musical applications.

Timbre characteristics and sound description

  • Bass : compact, fast and well defined, with a dry control.
  • Mids : linear and transparent, with the typical RCA timbre that guarantees natural realism and voices rich in presence.
  • Highs : Clear and bright, with an airy extension that gives freshness and detail.
  • Dynamics : Lively and responsive, with excellent rendition of microdetails and smooth transient response.
  • Soundstage : Wide and uncluttered, with clear instrument separation and a coherent three-dimensional soundstage.

🎧 Use in Hi-Fi Stereo amplifiers
Designed as a “low noise” version of the 12AX7, the 7025 RCA Clear Top is ideal for hi-fi preamps and amplifiers, especially vintage THE FISHER systems, where it delivers natural timbre, quietness and coherence.

🎸 Use in music amplifiers
Also highly regarded by musicians, the 7025 RCA Clear Top offers a crisp, clear sound with controlled harmonic distortion and punchy dynamics. Perfect for guitarists who want a clean, crystal-clear vintage sound.

🎯 Note for audiophiles and collectors
The matched pair of 7025 RCA Clear Top Long Gray Plates Side D Getter branded THE FISHER is a rare and sought-after variant, particularly prized for its transparency, low microphony, and distinctive construction. This tube is highly valuable for philological restorations, collectibles, and high-quality hi-fi systems.

Test Results:

Valve tested on AMPLITREX AT-1000 Tube Tester:

  • Test Conditions: Va = 250V ; Vg = -2V
  • Average 100%: Gm = 1600 ; Ia = 1.2 mA
  • Test Result: VERY STRONG

Valve:

  • Section 1: Gm = 1700 ; Ia = 1.1 mA
  • Section 2: Gm = 1800 ; Ia = 1.1 mA
Additional Tests Performed:
  • Microphonics: Low. Tested and approved for use in hi-fi and guitar amplifiers, including V1.
  • Balance: Both sections are balanced, with very close values. Also ideal as a phase inverter.
  • Output Quality: Excellent – Very strong and stable output, no fluctuations.
  • Short circuits and GAS: Absent.

Conditions:

  • Condition: Vintage tubes - Tested and in perfect working order. Shipped in our custom box for optimal protection.
  • Functionality: Fully functional.
  • Aesthetic condition: Adequate – Some writing is faded or illegible, overall appearance shows obvious signs of aging. See photos for details.
  • Manufacturing Code: not decipherable – RCA USA production, identifiable by its 1960s construction features

Find out why our valves are different →

Terms of Sale & Safety

Sales Terms & Product Safety

Each vacuum tube is carefully selected, tested, and verified in our laboratory before shipment. Where stated in the listing, test results, matching data, and declared characteristics refer to measurements performed using the specified test equipment and operating conditions.

Sound descriptions are provided for guidance only and reflect the characteristics generally associated with that particular tube type. Personal sound preferences, tube rolling, or perceived differences between audio systems do not constitute a product defect.

Before installation, please verify the tube’s electrical and mechanical compatibility with your equipment and follow the manufacturer’s instructions.

New production and NOS tubes are shipped with a tamper-evident security seal and internal technical documentation to ensure traceability of the product’s condition at the time of shipment.

Product Safety (GPSR)

Vacuum tubes are electronic components intended exclusively for use in compatible equipment and must be installed in accordance with the equipment manufacturer’s instructions.

Due to their historical or vintage nature, certain technical specifications may be based on original datasheets or equivalent technical documentation when documentation from the specific manufacturer is unavailable.

Use only with suitable equipment. Keep out of reach of children.

Shipping & Returns

Shipping & Returns

We ship worldwide using carefully selected express carriers and protective packaging specifically designed for vacuum tubes.

If you change your mind, you may exercise your right of withdrawal within 14 days of delivery, where applicable under the relevant consumer protection laws. The product must be returned complete with its original packaging and accessories, in the same commercial condition in which it was received. Return shipping costs are the responsibility of the customer.

Every returned item undergoes a technical inspection. Installation, use, tube rolling, or any other handling may reduce the product’s commercial value and may affect the refund amount, in accordance with applicable law.

If you believe the product has a lack of conformity, our laboratory will carry out the necessary inspections and apply the remedies provided by the applicable consumer protection legislation.

For further details, Customers are invited to consult the “Terms and Conditions” and “Refund Policy” sections of our website, or to contact us before placing an order.

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  • ATTENTION PLEASE

    Please understand that the writing on the glass of vintage valves has become very delicate over the years and comes off easily. You must handle them with extreme care to avoid this. Wear and damage to the writing on the valves reduces their market value and causes damage. Please exercise extreme caution.

  • ATTENTION PLEASE

    We wish to inform you that any attempts to manipulate shipping destination information in order to obtain lower shipping rates may be considered fraudulent acts. Please provide accurate information and contact us if you have any concerns. We reserve the right to review and, if necessary, cancel orders that we deem to be in violation of our conditions. Thank you for your understanding and cooperation.