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TOSHIBA

12AX7 / ECC83 BALDWIN by TOSHIBA – Vintage Japanese Long Plates – Matched Pair – Low Noise

12AX7 / ECC83 BALDWIN by TOSHIBA – Vintage Japanese Long Plates – Matched Pair – Low Noise

€79,90 EUR
€79,90 EUR
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12AX7 / ECC83 BALDWIN by TOSHIBA – Long Gray Plates – O Getter – Matched Pair – Made in Japan

AMPLITREX Tested – VERY STRONG – Low Noise & Microphonics – Vintage Japanese Toshiba Production

Description

Matched pair of 12AX7 / ECC83 Baldwin produced by Toshiba in Japan, carefully selected for preamplifiers, phono stages, integrated amplifiers, instrument amplifiers, and compatible applications that require low noise, stability, and good electrical consistency between channels.

The tubes feature the sought-after Long Gray Plates construction with a top O Getter, typical of vintage Toshiba production. The Baldwin branding indicates a supply intended for professional electronic organs, an application where reliability, quiet operation, and continuous performance were fundamental requirements.

Both come from the same manufacturing batch and have been tested and matched in our laboratory using the Amplitrex AT-1000 Tube Tester. The pair achieved a VERY STRONG rating and exhibited Low Noise & Microphonics, a particularly important characteristic in high-gain stages and the most sensitive positions in the circuit.

Matching was performed on transconductance, with very close Gm values between the two tubes and good overall uniformity of the four sections.

Sonically, they offer a clean, balanced, and musical presentation, with controlled bass, natural and well-articulated mids, open but never aggressive highs, and precise dynamic response. Toshiba production is appreciated for transparency, quietness, and reliability, maintaining a fluid and pleasant character even during prolonged listening sessions.

Suitable for hi-fi preamplifiers, phono stages, driver stages, phase inverters, headphone amplifiers, and instrument amplifiers compatible with 12AX7 / ECC83.

The tubes are used and fully functional. The Baldwin lettering shows wear, clearly visible in the photographs, but without any impact on performance.

A truly tested, selected, and matched vintage Japanese pair from Vacuum Tubes Treasures, ideal for those seeking quiet, musical, and still very strong 12AX7 Toshiba tubes.

Test Results

Tubes 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

Tube 1:

  • Section 1: Gm = 1450 ; Ia = 1.1 mA
  • Section 2: Gm = 1400 ; Ia = 1.1 mA

Tube 2:

  • Section 1: Gm = 1350 ; Ia = 0.9 mA
  • Section 2: Gm = 1400 ; Ia = 1.0 mA

Additional Tests Performed

  • Burning Test: 48h – OK
  • Microphonics: Low. Tested and suitable for hi-fi use, including phono stages and guitar amplifiers. Also suitable for V1 position.
  • Balance: Very good. The sections are consistent and well-aligned, making the tube also suitable for use as a phase inverter in hi-fi and instrument applications.
  • Emission Quality: Excellent – very strong and stable emission, without fluctuations.
  • Shorts and GAS: Absent.

Condition

  • Condition: Vintage Tubes - Tested and fully functional. Supplied in our custom box for optimal protection.
  • Functionality: Perfectly operational.
  • Cosmetic condition: Good – Lettering partially faded, but still legible. Tube body in good condition. See photos for details.
  • Manufacturing Code: Code not decipherable. Production estimated to be from the 1960s based on construction characteristics.

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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.