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MULLARD

12AU7 / ECC82 MULLARD Mitcham k61 Short Plates Halo Getter Balanced Test Like NOS

12AU7 / ECC82 MULLARD Mitcham k61 Short Plates Halo Getter Balanced Test Like NOS

£192.00 GBP
£192.00 GBP
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12AU7 / ECC82 MULLARD Mitcham k61 – Short Plates – Halo Getter – Balanced Sections – Like NOS Performance – Made in GT.BRITAIN

AMPLITREX Tested – VERY STRONG – Low Noise & Microphonics – Vintage UK MULLARD Production

Test Results

Tubes tested on AMPLITREX AT-1000 Tube Tester

Test Conditions: Va = 250V, Vg = -8.5V
Average 100%: Gm = 2200 ; Ia = 10.5 mA
Test Result: VERY STRONG

Tube:
  • Section 1: Gm = 2100 ; Ia = 11.0 mA
  • Section 2: Gm = 2100 ; Ia = 10.0 mA

Additional Tests Performed

  • Burn-in / Stability Test: 48h – OK
  • Microphonics: Low. Tested and suitable for hi-fi use, including phono stages and guitar amplifiers. Also suitable for V1.
  • Balance: The sections are consistent and well-aligned, making the tubes suitable for use as phase inverters in hi-fi and instrumental applications.
  • Emission Quality: Excellent – Very strong and stable emission, without fluctuations.
  • Shorts and GAS: Absent.

Description:

Precious 12AU7 / ECC82 Mullard Mitcham k61, produced in Great Britain in 1960 and characterized by the classic Short Plates with Halo Getter construction, one of the most appreciated configurations of British Mullard production.

The manufacturing code k61 R0A4 identifies Mullard Mitcham production, belonging to the historic English manufacturer that helped make the ECC82 one of the most sought-after tubes in hi-fi and professional fields. The internal construction is fully consistent with Mullard production of the period, known for material quality, stability, and long operational life.

The tube underwent 48 hours of burn-in / stability test and was subsequently tested in our laboratory using an Amplitrex AT-1000 Tube Tester, achieving a VERY STRONG classification. The two sections show excellent balance, and the tube was found to be Low Noise & Microphonics, with stable electrical behavior and performance comparable to that of an NOS specimen.

Sonically, Mullard ECC82s from this period are appreciated for rich, fluid, and natural reproduction, with full and well-controlled bass, rich and harmonically dense mids, refined and never aggressive high frequencies, and a wide, stable, and three-dimensional soundstage. The overall character is musical and engaging, with that typical combination of warmth, depth, and naturalness that made British Mullard production famous.

Ideal for hi-fi preamplifiers, driver stages, phase inverters, tube DACs, headphone amplifiers, and instrumental applications compatible with 12AU7 / ECC82. Thanks to the Low Noise & Microphonics selection and well-balanced sections, it is particularly interesting for sensitive stages and applications where uniformity and stability are important.

The tube is Vintage, carefully tested, and fully functional. Aesthetic conditions are good, with partially eroded but still legible markings and the tube body in good overall condition.

An authentic 1960 Mullard Mitcham k61, truly tested and selected by Vacuum Tubes Treasures, ideal for those seeking a strong, quiet vintage British ECC82 with performance close to that of an NOS tube.

Conditions

  • Conditions: Vintage tubes - Tested and perfectly functional. Supplied in our custom box for optimal protection.
  • Functionality: Fully operational.
  • Aesthetic conditions: Good – Markings partially eroded, but still legible. Tube body in good condition. See photos for details.
  • Manufacturing Code: k61 R0A4 → k6x indicates an ECC82 with sequential progression of x, where the increment of x indicates production changes - R0A4 R → Mullard, Mitcham - 0 (out of four digits) → 1960 - A → January - 4 → 4th week of the month

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
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.