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SYLVANIA

12AT7WA E81CC 6201 NOS Sylvania – 3 Mica Gray Wing Plates Square Getter Tube USA 1947

12AT7WA E81CC 6201 NOS Sylvania – 3 Mica Gray Wing Plates Square Getter Tube USA 1947

€59,90 EUR
€59,90 EUR
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12AT7WA ( E81CC 6201 ) SYLVANIA NOS 3 Mica Gray Wing Plates Square Tilt Getter Tested Tube Made in USA '47

Description:

The 12AT7 WA (E81CC) SYLVANIA , produced in 1947 in the military version (WA), features a 3-mica configuration, grey wing-type plates and a square tilt getter , which testify to its origins among the first series of technical excellence in the post-war period. This valve is a rare example of balance between structural robustness and sonic refinement , with a tonal output that combines precision, transparency and dynamic control.

Bass : dry, well-defined, and fast. The low register is not pronounced but extremely controlled, ideal for applications requiring precise rhythm and the absence of swelling , while maintaining a firm and coherent harmonic foundation.

Mids : Tidy, transparent, and slightly refined. Vocals are well-centered, with a natural timbre and a discreet yet discernible presence. Acoustic instruments maintain clarity without ever being intrusive. The overall character is sober and balanced.

Highs : extended and refined, with an open yet controlled texture. The high range never pushes forward, but accompanies the listening experience with elegance and coherence , avoiding harshness or fatigue even on high-resolution systems.

Dynamics : fluid, smooth, and precise. The valve responds immediately but measuredly, without excess, allowing for clear reading of microdetails and a harmonious transition between different sound intensity levels.

Soundstage : coherent, stable, and well-focused. The stereo image develops naturally, maintaining good channel separation and credible instrument placement, with a transparent but never cold soundstage.

The 12AT7 WA SYLVANIA 3 mica from 1947 , in this NOS version tested , is a valve with a neutral, polite and professional character, ideal for those seeking cleanliness, readability and operational stability in the audio field, both in hi-fi systems and in technical and professional equipment.

🎧 Use in Headphone Amplifiers and Hi-Fi Driver Stages

Thanks to its tonal transparency and the absence of artificial enhancements , the 12AT7 WA SYLVANIA proves excellent in the best headphone amplifiers and tube preamplifiers. In circuits such as mu-follower , SRPP , or cathode follower , it delivers a clear, detailed and fatigue-free sonic presentation, enhancing reference headphones such as the Sennheiser HD650 , Focal Clear , Hifiman Ananda or ZMF Aeolus , in configurations that aim for neutral and natural reproduction .

🎸 Use in Guitar and Bass Amplifiers

The 12AT7 WA SYLVANIA also finds its place as a driver or inverter in tube guitar amplifiers , especially in blackface or vintage-inspired boutique Fender models that use this type of tube to optimize headroom and definition . It offers a clean, controlled sound with a ready attack and progressive saturation , ideal for musicians who want linear dynamic response and tonal fidelity . On bass amps or rack preamps, it allows for a tight and articulate output, with excellent detail in complex passages.

🎯 Note for audiophiles :
A sober, solid and coherent tube, perfect for those seeking technical rigor and controlled musical performance , without timbral imbalances or artificial euphony. A reliable foundation for neutral listening systems or for professional applications where transparency in the gain section is essential.

Test Results:

Valve tested on AMPLITREX AT-1000 Tube Tester:

  • Test Conditions: Va = 250V, Vg = -2V
  • Average 100%: Gm = 5.5 ; Ia = 10.0 mA
  • Test Result: VERY STRONG

Valve:

  • Section 1: Gm = 4.1 ; Ia = 9.6 mA
  • Section 2: Gm = 5.9 ; Ia = 12.8 mA

Additional Tests Performed:

  • Microphonics: Low Noise & Microphonics – Tested and compliant for use in hi-fi systems and guitar amplifiers.
  • Output Quality: Excellent – Very strong and stable output, no fluctuations.
  • Short circuits and GAS: Absent.

Conditions:

  • Condition: NOS - New Old Stock - Tested and in perfect working order. Comes 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: 706 - produced 6th week of 1947

Find out why our valves 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.

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