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WESTINGHOUSE

12AX7 / ECC83 Knight by Westinghouse Short Gray Plates Square Getter Tube Made in USA '50s

12AX7 / ECC83 Knight by Westinghouse Short Gray Plates Square Getter Tube Made in USA '50s

Regular price £48.00 GBP
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12AX7 / ECC83 Knight by Westinghouse Short Gray Plates Square Getter Tube Made in USA '50s

AMPLITREX Tested – STRONG – Low Noise & Microphonics Vintage American Westinghouse Production

Description:

This 12AX7 / ECC83 branded Knight, produced by Westinghouse in the USA in the 1950s, is a valuable testament to the best American production of the era, when numerous commercial brands relied on major US manufacturers for professional-quality tubes.

The construction with Short Gray Plates and Square Getter identifies a typical configuration of Westinghouse productions from the late 1950s, appreciated for its reliability, robust construction, and balanced musicality.

This tube has been carefully checked using an AMPLITREX AT-1000 Tube Tester, resulting in STRONG emission, with stable output and regular electrical behavior.

The Low Noise & Microphonics selection makes it particularly interesting for audio applications where quietness and operational reliability are important.

Sonic Characteristics

Westinghouse ECC83s from this period are generally appreciated for their balanced and musical character, with a natural and uncolored presentation.

Bass

The bass range is well-controlled and accurately articulated, with good presence and always an orderly response.

Mids

The mids are natural and well-focused, with good vocal intelligibility and a balanced harmonic rendering of acoustic instruments.

Highs

The high range is clean and pleasantly extended, with good detail and absence of harshness.

Dynamics

The dynamic response is fluid and coherent, capable of effectively following musical variations without sounding compressed.

Soundstage

The soundstage appears well-organized, with correct instrument separation and a credible presentation of the acoustic space.

🎧 Use in Hi-Fi Amplifiers

This 12AX7 / ECC83 is particularly suitable for:

  • tube preamplifiers
  • line stages
  • compatible phono stages
  • integrated amplifiers
  • driver stages
  • restorations of vintage American electronics

The Low Noise & Microphonics selection also makes it suitable for sensitive circuit positions.

🎸 Use in Musical Applications

In guitar amplifiers and other compatible musical applications, this Westinghouse offers:

  • good note definition
  • natural and present mids
  • balanced dynamic response
  • low noise

These characteristics make it interesting for both vintage amplifiers and boutique projects inspired by classic American sounds.

🎯 Note for Audiophiles

The Westinghouse Made in USA productions of the 1950s represent an important part of American tube history.

The combination of:

  • original USA Westinghouse production
  • Knight branding
  • Short Gray Plates
  • Square Getter
  • Low Noise & Microphonics
  • STRONG emission
  • well-balanced sections

makes this tube an interesting choice for those who desire an authentic, reliable, and musically balanced American ECC83.

A selected vintage example that preserves the charm and solidity of American electronic tradition from the golden age.


Test Results

Tested on AMPLITREX AT-1000 Tube Tester

Voltage Test: Va = 250V, Vg = -2V
Average 100%: 
Gm = 1600 ; Ia = 1.2 mA
TEST RESULT:
 STRONG

Tube :

  • Section 1: Gm = 1300 ; Ia = 0.8 mA
  • Section 2: Gm = 1400 ; Ia = 0.9 mA

Additional Tests Performed:
  • Microphonics: Low. Tested and suitable for use in hi-fi, even in phono stages and guitar amplifiers. Also suitable for V1.
  • 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.

Condition:

  • Condition: Vintage Tubes - Tested and fully functional. Supplied in our custom box for optimal protection. 
  • Functionality: Perfectly operational.
  • Cosmetic Condition: Good – Markings partially eroded, but still legible. Tube body in good condition. See photos for details.

Manufacturing Code:

  • 337 304 → RMA/EIA Open Date Code → manufactured the 04th week of 1953 - 337 → Westinghouse Electric Corporation, Baltimore 3, Md.

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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.