1 15

MULLARD

12AX7 / ECC83 EICO by MULLARD Blackburn Matched Pair Short Gray Plates Halo Getter Made in GT. BRITAIN '62

12AX7 / ECC83 EICO by MULLARD Blackburn Matched Pair Short Gray Plates Halo Getter Made in GT. BRITAIN '62

€249,90 EUR
€249,90 EUR
Sale Sold out
Taxes included. Shipping calculated at checkout.

12AX7 / ECC83 EICO by MULLARD Blackburn Matched Pair Short Gray Plates Halo Getter Made in GT. BRITAIN '62

Description:

The 12AX7 / ECC83 EICO by MULLARD , produced in the historic Blackburn factory in 1962 , represent one of the most authentic and musically refined expressions of the great British Mullard school.

The EICO marking identifies a supply intended for the professional and hi-fi market, but the valve is in all respects a genuine Mullard Blackburn , made according to the highest standards of the English golden age.

The construction with short gray plates and halo getter is typical of Mullard productions from the early 60s, appreciated for their stability, reliability and an unmistakable, warm and natural sound reproduction.

Sound Characteristics

Bass: Compact, rounded, and well-controlled. The low range is authoritative but never intrusive, with a musical and coherent response that gives structure to the sound message.

Mids: The true Mullard trademark. Rich, dense, and harmonically complete, with extremely natural voices and a full, three-dimensional rendition of acoustic instruments.

Highs: Silky, well-extended, and refined. The highs are elegant and never aggressive, with a sweetness that favors long, engaging listening sessions.

Dynamics: Fluid and natural. Transient response is prompt but always composed, with highly expressive microdynamics that are free from rigidity.

Soundstage: Wide, deep, and stable. The soundstage is well-layered, with realistic positioning and natural separation of musical lines.

🎧 Use in Hi-Fi Amplifiers

Ideal for:

  • medium-high and high quality preamplifiers and input stages,
  • hi-fi amplifiers that seek musicality, naturalness and timbral coherence.

Particularly suitable for jazz, classical, vocal and acoustic music.

🎸 Use in Music Applications

Also highly appreciated in:

  • vintage and boutique guitar amplifiers,
  • applications where rich harmonics, expressive mids and an authentically British sonic character are desired.

🎯 Note for audiophiles and technicians

The 12AX7 / ECC83 EICO by MULLARD Blackburn – Short Gray Plates – Halo Getter (1962) represent:

  • authentic Mullard production Made in Great Britain ,
  • one of the most musical and appreciated versions of the 60s,
  • solid and historically correct construction,
  • warm, natural and deeply engaging timbre.

An ideal choice for those who want the true Mullard Blackburn sound , with all the charm, elegance and musicality that have made these 12AX7s a timeless reference.

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 #1:

  • Section 1: Gm = 1600 ; Ia = 1.1 mA
  • Section 2: Gm = 1500 ; Ia = 0.9 mA

Valve #2:

  • Section 1: Gm = 1500 ; Ia = 0.9 mA
  • Section 2: Gm = 1100 ; Ia = 0.8 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: Vintage tubes - Tested and in perfect working order. Shipped in our custom box for optimal protection.
  • Functionality: Fully functional.
  • Cosmetic condition: Good – Lettering partially eroded, but still legible. Valve body in good condition. See photos for details.

Manufacturing Code:

  • I61 B2I2 → I6x indicates an ECC83 with the sequential progression of x, where the increment of x indicates the production changes - B2I2 B → Mullard, Blackburn - 2 (out of four digits) → 1962 - I → September - 2 → 2nd week of the month
  • I61 B2K2 → I6x indicates an ECC83 with the sequential progression of x, where the increment of x indicates the production changes - B2I2 B → Mullard, Blackburn - 2 (out of four digits) → 1962 - K → November - 2 → 2nd week of the month

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

View full details

  • 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.