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RCA

12AU7 / ECC82 Baldwin by RCA AMPLITREX Matched Quad Clear Top Long Gray Plates Side D Getter Tubes

12AU7 / ECC82 Baldwin by RCA AMPLITREX Matched Quad Clear Top Long Gray Plates Side D Getter Tubes

€159,90 EUR
€159,90 EUR
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12AU7 / ECC82 Baldwin by RCA Matched Quad – Clear Top – Long Gray Plates – Side D Getter – Made in USA ’59

Amplitrex Tested – VERY STRONG – Low Noise & Microphonics

Selected quartet of 12AU7 / ECC82 Baldwin by RCA, production Made in USA circa 1959, with Clear Top, Long Gray Plates and Side D Getter construction. A very interesting configuration from RCA's American production of the late 1950s, appreciated for its stability, consistency, and build quality.

Baldwin-branded tubes were often produced by RCA for professional organ applications, with high-quality standards and a selection focused on long-term reliability. The Clear Top design, typical of some RCA productions, contributes to an open, clean, and well-defined sound.

The quartet comes from the same manufacturing batch and has been tested and selected in our laboratory using an Amplitrex AT-1000, resulting in a Matched Quad with extremely close values.

All tubes are rated VERY STRONG, with stable emission, low noise, and microphonics. Burn-in test passed.

Sonically, this quartet offers a balanced, transparent, and controlled presentation. The Clear Top construction, combined with the long plates, delivers a clean and articulate sound, with fast bass, linear mids, open but not aggressive highs, and an organized and stable soundstage.

Suitable for line preamplifiers, phono stages, drivers, buffers, and circuits compatible with 12AU7 / ECC82, where coherence between tubes, low noise, and operational stability are required.

A truly selected and verified RCA/Baldwin quartet to work together, ideal for those seeking vintage American production, accurate matching, and reliable sound performance in the full style of Vacuum Tubes Treasures.

Test Results:

Tube 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 #9:
  • Section 1: Gm = 2100 ; Ia = 9.6 mA
  • Section 2: Gm = 2100 ; Ia = 9.2 mA
Tube #23:
  • Section 1: Gm = 2200 ; Ia = 10.2 mA
  • Section 2: Gm = 2000 ; Ia = 9.2 mA
Tube #25:
  • Section 1: Gm = 2100 ; Ia = 10.0 mA
  • Section 2: Gm = 2100 ; Ia = 9.0 mA
Tube #26:
  • Section 1: Gm = 2100 ; Ia = 9.8 mA
  • Section 2: Gm = 2100 ; Ia = 9.6 mA
Additional Tests Performed:
  • Microphonics: Low. Tested and compliant for use in hi-fi, including phono stages and guitar amplifiers. Also suitable for V1.
  • Balance: 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: Excellent – Very strong and stable emission, without fluctuations.
  • Shorts and GAS: Absent.

Condition:

  • Condition: Vintage - Tested and working - Supplied in our custom box for optimal protection.
  • Functionality: Perfectly operational.
  • Cosmetic Condition: Fair – Markings almost completely faded. See photos for details.

Manufacturing Code:

  • 59-26 274 → RMA/EIA Open Date Code → manufactured the 26th week of 1959 - 274 → Radio Corporation of America, Camden, N. J.

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.

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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.