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MULLARD

12AX7 / ECC83 NOS MULLARD Blackburn 1959 – Long Gray Plates – Halo Getter – Balanced Section

12AX7 / ECC83 NOS MULLARD Blackburn 1959 – Long Gray Plates – Halo Getter – Balanced Section

€239,00 EUR
€239,00 EUR
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12AX7 / ECC83 NOS MULLARD – Blackburn (Great Britain) 1959
Long Gray Plates – Halo Getter – Balanced Section – Low Noise & Microphonics

Description:

This 12AX7 / ECC83 NOS MULLARD, produced in the historic Blackburn factory (Great Britain) in May 1959 (f92 B9E), represents one of the most iconic and sought-after versions of the Mullard production of the late 1950s.

The Long Gray Plates configuration with halo getter identifies the classic Mullard “golden era” phase, appreciated for the extraordinary harmonic richness, tonal depth and natural musicality that have made these tubes an absolute reference among audiophiles and musicians.

This unit is in authentic NOS condition , with an engraved manufacturing code, balanced sections, and low noise and microphony. This tube fully expresses the historical prestige and construction refinement of Mullard Blackburn.

Sound Characteristics

Bass: Fuller and more textured than the short-plate versions. The low end is deep, authoritative, and structured, with a sense of greater body and harmonic density.

Mids: The absolute strength of the long plate. Rich, three-dimensional, and harmonically complex. Vocals are more present, palpable, and engaging, with a natural, fluid texture.

Highs: Sweet, airy, and refined. The highs are extended yet elegant, with a controlled brightness that doesn't tire the listener.

Dynamics: Expressive and organic. Microdynamics are particularly evident, with a natural and musical transient response that is never aggressive.

Soundstage: Wide and deep, with a greater sense of three-dimensionality and layering than short plates. The soundstage is stable, realistic, and full of space between instruments.

🎧 Use in Hi-Fi Amplifiers

Ideal for:

  • high-level input and pre-amplification stages,
  • preamplifiers and hi-fi integrated amplifiers where materiality, depth and harmonic richness are sought.

Particularly suitable for jazz, vocal, classical, acoustic music and quality analog recordings.

🎸 Use in Music Applications

Also highly appreciated in:

  • vintage and boutique guitar amplifiers,
  • position V1 in contexts where greater harmonic thickness is desired.

It offers rich harmonics, natural dynamic response and the classic British Mullard character in its fullest expression.

🎯 Note for audiophiles

  • Blackburn “golden era” production with engraved code f92 B9E
  • true NOS condition
  • balanced sections with low noise and contained microphonics
  • one of the absolute references among the Mullard ECC83s of the late 50s

A tube designed for those who want the most expressive, deep and harmonically rich version of the Mullard sound, with superior sonic and collectible value, in true 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 = 1400 ; Ia = 1.0 mA
  • Section 2: Gm = 1400 ; Ia = 1.0 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 are coherent and well aligned, making the valve also suitable for use as a phase inverter in hi-fi and instrumental applications.
  • 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: f92 B9E→ f92 indicates an ECC83 long plates with the sequential progression of x, where the increment of x indicates the production changes - B9E B → Mullard, Blackburn - 9 (out of three digits) → 1959 - E → May

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.

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