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AMPEREX

12AX7 / ECC83 Amperex Bugle Boy mC6 AMPLITREX Tested Long Plates Foil Getter '58

12AX7 / ECC83 Amperex Bugle Boy mC6 AMPLITREX Tested Long Plates Foil Getter '58

€249,90 EUR
€249,90 EUR
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12AX7 / ECC83 Amperex Bugle Boy mC6 Long Plates – Foil Getter – Heerlen 1958

AMPLITREX Tested – STRONG – Low Noise & Microphonics – Vintage Heerlen Production

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: STRONG

Tube :

  • Section 1: Gm = 1200 ; Ia = 0.9 mA
  • Section 2: Gm = 1400 ; Ia = 1.0 mA
Additional Tests performed:
  • Burn-in / Stability Test: 48h – OK
  • Microphonics: Low. Tested and suitable for use in hi-fi equipment and guitar amplifiers, even in the most sensitive audio stages.
  • Balance: Good. The sections show consistent balance, fully compatible with use in hi-fi and musical amplifiers, in all applications where absolute symmetry between sections is not required.
  • Emission Quality: Strong – Strong and regular emission, suitable for any application.
  • Shorts and GAS: Absent.

Description

Valuable 12AX7 / ECC83 AMPEREX Bugle Boy mC6, authentic Philips Heerlen Made in Holland 1958 production, featuring the sought-after Long Plates with Foil Getter construction, one of the most appreciated configurations among early Dutch ECC83s and particularly interesting for enthusiasts of high-level vintage European tubes.

The engraved code mC6 Δ8G precisely identifies this historical production: Δ indicates the Philips factory in Heerlen, Holland, while 8G places manufacturing in July 1958. The famous Amperex Bugle Boy branding, combined with the Long Plates and Foil Getter of early Heerlen productions, makes this example particularly sought after for both audio use and its collectible interest.

The tube has been carefully tested in our laboratory using the Amplitrex AT-1000 Tube Tester, obtaining a STRONG rating, with Gm 1200 / Ia 0.9 mA and Gm 1400 / Ia 1.0 mA values. The sections show good overall balance, and the emission is strong, regular, and stable.

It has also passed a 48-hour Burn-in / Stability Test and has been selected for Low Noise & Microphonics, a particularly important characteristic for a high-gain ECC83. It is therefore suitable for V1 and the most sensitive audio stages, as well as for a wide range of hi-fi and instrumental applications. No shorts, gas, or other anomalies were detected.

Sonically, the late 1950s Amperex Bugle Boy Long Plates Heerlen are particularly appreciated for a rich, open, and musical reproduction, with natural and harmonically complex mids, articulated bass, and airy, detailed high frequencies without being aggressive. The presentation is engaging and three-dimensional, with a broad and well-focused soundstage: characteristics that have made these early Heerlen productions among the most desired European vintage ECC83s.

Ideal for hi-fi preamplifiers, phono stages, integrated amplifiers, line stages, DACs and tube buffers, and guitar amplifiers compatible with 12AX7 / ECC83, especially when seeking the refined character of early Philips/Amperex Dutch productions.

The tube is Vintage, carefully tested, and fully functional. The aesthetic condition is good, with partially eroded but still legible markings and a well-preserved tube body. It comes in our custom box for optimal protection.

A sought-after AMPEREX Bugle Boy mC6 12AX7 / ECC83 Long Plates Foil Getter Heerlen from 1958, genuinely tested and selected by Vacuum Tubes Treasures, ideal for those who desire an authentic 1950s Dutch ECC83 that is strong, Low Noise & Microphonics, and with the prestigious Long Plates/Foil Getter construction of early Heerlen productions.

Conditions:

  • Conditions: Vintage Tubes - Tested and fully functional. Supplied in our custom box for optimal protection.
  • Functionality: Perfectly operational.
  • Aesthetic condition: Good – Markings partially eroded, but still legible. Tube body in good condition. See photos for details.
  • Manufacturing Code: mC6 Δ8G - Δ → Heerlen (Holland), 8 (on three digits) → 1958 - G → July 

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.

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