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MULLARD

12AX7 / ECC83 Mullard Blackburn MC1 Long Gray Plates Goalpost Getter GT. Britain '57

12AX7 / ECC83 Mullard Blackburn MC1 Long Gray Plates Goalpost Getter GT. Britain '57

643,00 RON
643,00 RON
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12AX7 / ECC83 Mullard Blackburn MC1 – Long Gray Plates – Goalpost Getter – Made in GT. Britain 1957

AMPLITREX Tested – Balanced Sections – Low Noise & Microphonics – Vintage Blackburn Production

Description

12AX7 / ECC83 Mullard tube, produced in the historic Blackburn, Great Britain, plant in 1957, with MC1 code, selected for compatible hi-fi and musical applications where British sound character, internal balance, and low noise are required.

The construction with Long Gray Plates and rare Goalpost Getter identifies one of the most fascinating configurations of the early 1950s Blackburn ECC83s, a period particularly sought after by Mullard enthusiasts for their build quality, harmonic richness, and natural musicality.

The tube is in excellent aesthetic condition, with well-preserved original screen printing and a very clean internal structure. See photos for details.

It was tested in our laboratory using the Amplitrex AT-1000 Tube Tester, found to be in perfect working order, with balanced sections and classified as Low Noise & Microphonics. The emission is currently classified as GOOD, while maintaining full operational stability and the authentic character of the early Mullard Blackburns.

From a sonic perspective, it offers a rich, natural, and engaging rendition, with full and credible lows, extremely expressive mids, refined and never aggressive highs. The presentation prioritizes musical coherence, fluidity, and harmonic richness, characteristics that made the Mullard Blackburn long plate of the 1950s famous.

Suitable for tube preamplifiers, line stages, compatible phono stages, integrated amplifiers, vintage British hi-fi equipment, boutique amplifiers, and circuits compatible with 12AX7 / ECC83.

A rare and fascinating Mullard Blackburn MC1 Goalpost Getter 1957, truly tested by Vacuum Tubes Treasures, ideal for those seeking a historic, silent, balanced British ECC83 with an unmistakable sound character.

Test Results:

Tube tested on AMPLITREX AT-1000 Tube Tester:

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

Tube:

  • Section 1: Gm = 1000 ; Ia = 0.7 mA
  • Section 2: Gm = 1000 ; Ia = 0.8 mA
Additional Tests Performed:
  • Microphonics: Low. Tested and suitable for hi-fi use, including phono stages and guitar amplifiers. Also suitable for V1.
  • Noise: Low and well controlled. Silent operation in hi-fi and musical amplifiers in designated positions.
  • Balance: The sections are consistent and well aligned, making the tube also suitable for use as a phase inverter in hi-fi and instrumental applications.
  • Emission Quality: Good Emission – Good and regular emission, suitable for any application
  • Shorts and GAS: Absent.

Condition:

  • Condition: Vintage Tubes - Tested and fully functional. Supplied in our custom box for optimal protection. 
  • Functionality: Perfectly operational.
  • Aesthetic Condition: Excellent – Markings excellently preserved, minimal signs of age. See photos for details.
  • Manufacturing Code: mC1 B7D→ mCx indicates a long plate ECC83 with the sequential progression of x, where the increment of x indicates production changes - B7D B → Mullard, Blackburn - 7 (three digits) → 1957 - D → April

Discover why our tubes 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
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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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