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SYLVANIA

12AX7 ECC83 Baldwin by SYLVANIA – Tested Pair – Long Gray Plates Halo Getter Made in USA

12AX7 ECC83 Baldwin by SYLVANIA – Tested Pair – Long Gray Plates Halo Getter Made in USA

€62,93 EUR
€89,90 EUR €62,93 EUR
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12AX7 ECC83 Baldwin by SYLVANIA – Tested Pair – Long Gray Plates Halo Getter Made in USA

Description:

This pair of 12AX7 (ECC83) Baldwin by SYLVANIA , made in the USA at the Emporium, Pennsylvania factory, is from selections made for Baldwin organs in the late 1950s and early 1960s.

The construction with Long Gray Plates and Halo Getter is one of the most recognizable and appreciated among the vintage Sylvania ECC83s, known for its fluid musical rendering, natural dynamic behavior and a great feeling of “organic” in the sound.

The tubes have been individually tested in our laboratory with AMPLITREX AT-1000 and show GOOD / STRONG output , stable and reliable.
These are not a matched pair nor are they tubes selected for critical stages: they are offered as Tested Pair Tubes , designed for those looking for musicality, character and authentic sonic response , not laboratory symmetry.

Sound Features:

Low range: Balanced and natural, with a bass that's present but never intrusive. It offers a solid foundation that supports the sound without weighing it down.

Midrange: The heart of the Sylvania signature: lively, fluid, and musical, with an open delivery that enhances guitars, vocals, and acoustic instruments. The mid-highs are legible without becoming aggressive.

Highs: The air and sweetness typical of Sylvania long plates. The highs are open but rounded, pleasant even at high volumes.

Dynamics and Response: Prompt and natural response, with a musical behavior that follows the signal well. They don't seek artificial compression or hyper-control: what matters here is feel.

🎸 Use in Musical Instrument Amplifiers

Particularly suitable for:

  • non-critical positions (V2, V3, gain stages)
  • vintage and boutique American amplifiers
  • musical cleans, soft crunch, natural dynamics

They offer:

  • rich harmonics
  • good definition on attacks
  • predictable and musical behavior

Not recommended as a V1 in very high sensitivity amplifiers nor as a phase inverter .

Test Results:

Valve tested on AMPLITREX AT-1000 Tube Tester:

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

Valve 1:

  • Section 1: Gm = 1300 ; Ia = 0.7 mA
  • Section 2: Gm = 1600 ; Ia = 1.0 mA

Valve 2:

  • Section 1: Gm = 1300 ; Ia = 0.7 mA
  • Section 2: Gm = 1400 ; Ia = 1.1 mA
Additional Tests Performed:
  • Microphonics: Standard. Tested and approved for use in guitar amplifiers. Not recommended for the V1 position in high-sensitivity guitar amplifiers.
  • Balance: The sections have a moderate misalignment; this tube is suitable for use in non-critical stages (input/driver) and in guitar amplifiers. Not recommended as a phase inverter or where perfect balance between the sections is required.
  • Output Quality: Smooth, fluctuation-free output suitable for any application.
  • Short circuits and GAS: Absent.

Conditions:

  • Condition: Vintage tubes - Tested and in perfect working order. Shipped in our custom box for optimal protection.
  • Functionality: Fully functional.
  • Cosmetic condition: Good – Lettering partially eroded, but still legible. Valve body in good condition. See photos for details.

Manufacturing Code:

  • 312 026 → 312 indicates the manufacturer, i.e. Sylvania Electric Products Inc., Emporium, Pa. - 026 → 0 (out of three digits) → 1960 - 26 → 26th week of the year
  • 312 913 → 312 indicates the manufacturer, i.e. Sylvania Electric Products Inc., Emporium, Pa. - 913 → 9 (out of three digits) → 1959 - 26 → 26th week of the year

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.

  • 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.