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MULLARD

12AX7 / ECC83 NOS RCA by MULLARD – Short Gray Plates – Halo Getter – Made in GT. BRITAIN

12AX7 / ECC83 NOS RCA by MULLARD – Short Gray Plates – Halo Getter – Made in GT. BRITAIN

€169,00 EUR
€169,00 EUR
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12AX7 / ECC83 NOS RCA by MULLARD Short Gray Plates – Halo Getter – Low Noise & Microphonics - Made in GT. BRITAIN

Description:

The 12AX7 / ECC83 NOS RCA by MULLARD , Made in Great Britain , is a highly prestigious signal valve, made by Mullard to the highest standards of British manufacturing and supplied to RCA for hi-fi and professional applications.
The configuration with short gray plates and halo getter identifies one of the most balanced and reliable versions of the English ECC83, appreciated for its silence, operational stability and refined sound reproduction. The valve is NOS , tested, with low noise and contained microphonics , suitable even for sensitive positions in the circuit.

Sound Characteristics

Bass: Compact, rounded, and well-controlled. The low range is tidy and coherent, with a natural support that doesn't weigh down the musical message.

Mids: The hallmark of the Mullard school. Rich, warm, and three-dimensional, with believable vocals and acoustic instruments rendered with great naturalness and harmonic texture.

Highs: Silky, well-extended, and perfectly integrated. The highs are refined and never aggressive, allowing for extended listening without fatigue.

Dynamics: Smooth and natural. Excellent microdynamics and composed transient response, with a coherent and unrelenting musical delivery.

Soundstage: Wide, stable, and well-layered. The soundstage is believable and tidy, with natural separation of planes and precise focus.

🎧 Use in Hi-Fi Amplifiers

Ideal for input and preamplification stages in medium-high and high-end hi-fi systems, where musicality, silence and tonal balance are sought. Particularly suitable for jazz, classical, vocal and acoustic music.

🎸 Use in Music Applications

Also highly prized in guitar amplifiers and vintage instruments, especially in sensitive positions like the V1 , thanks to its low noise and low microphonics . It offers rich harmonics and an authentically British sonic character.

🎯 Note for audiophiles and technicians

  • authentic Mullard production Made in Great Britain ,
  • NOS condition,
  • low noise and limited microphonics ,
  • warm, natural and musically coherent timbre,
  • concrete historical and sound value.

A valve designed for those who want the true Mullard sound , elegant and timeless, capable of enhancing hi-fi and musical systems with naturalness and refinement, in full Vacuum Tubes Treasures style.

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 = 1600 ; Ia = 1.1 mA
  • Section 2: Gm = 1700 ; Ia = 1.2 mA
Additional Tests Performed:
  • Microphonics: Low. Tested and approved for use in hi-fi, including phono stages and guitar amplifiers. Also suitable for V1.
  • Noise: Low and well-controlled. Silent operation in hi-fi and music amplifiers in the intended positions.
  • Balance: The sections present a coherent balance, fully compatible with use in hi-fi and musical amplifiers, in all applications where absolute symmetry between the sections is not required.
  • Output Quality: Excellent – ​​Very strong and stable output, no fluctuations.
  • Short circuits and GAS: Absent.

Conditions:

  • Condition: NOS - New Old Stock - Tested and working - Supplied in our custom box for optimal protection.
  • Functionality: Fully functional.
  • Cosmetic condition: Excellent – ​​Excellently preserved lettering, minimal signs of wear. See photos for details.
  • Manufacturing Code: absent, identifiable by construction features. 1960s

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.

Vacuum Tubes Treasures
www.vtt.store | www.vacuumtubestreasures.com
📧 info@vacuumtubestreasures.com

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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.