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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

20.000 HUF
20.000 HUF
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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.

Discover why our tubes are different →

Condizioni di vendita e sicurezza

Anti-Tamper Security Seal Policy:
Each product is sealed to guarantee quality and integrity.
The right of withdrawal is subject to the seal remaining intact, as provided for by the Consumer Code.

Eco-Friendly Packaging:
The tube will be shipped with protective packaging to ensure safety during transport.
We use recycled and recyclable paper for packaging, along with brown ECO-KRAFT adhesive tape, eco-friendly and solvent-free.

Important Notes:
This tube, manufactured according to the standards of its era, is designed to operate in equipment compatible with vintage tubes.
It is recommended to follow standard safety guidelines to avoid malfunctions or damage.

Safety Assurance:
Although not tested according to modern GPSR regulations, this tube was designed to operate safely under the conditions for which it was manufactured.
We recommend using it only with equipment that supports vintage tubes, in order to avoid risks of malfunction or damage.
Technical data note:
In some cases, the technical data provided may be based on datasheets from other manufacturers or on equivalent historical specifications, when a specific official datasheet for the production batch of the listed item is not available.
Electrical characteristics may vary slightly depending on the production batch and manufacturing period, as is typical for thermionic components.

Safety Information:
Warning: Keep out of reach of children.
To be used under adult supervision.
Use the product only with equipment designed for vintage tubes.

Shipping & Returns

Shipping & Returns

Shipping Costs

Shipping costs vary depending on the total amount of the items in the cart and are calculated automatically during the checkout process.
All shipments are fully insured. The courier is automatically selected based on destination, weight, and shipment characteristics.

Shipping Times and Delivery

The indicated delivery times are purely indicative.
Any delays, storage issues, or operational changes made by the carrier (for example during peak periods such as holidays) are not attributable to Vacuum Tubes Treasures.

In such cases, we will nevertheless provide the Customer with all necessary support to open claims or assistance requests with the appointed courier.

International Shipping (Non-EU Countries)

For orders shipped to countries outside the European Union, any customs duties, import taxes, or additional charges are the sole responsibility of the recipient.
Vacuum Tubes Treasures has no control over these costs, which may vary from country to country. Customers are therefore advised to contact their local customs authorities prior to placing an order.

Warranty

All products sold by Vacuum Tubes Treasures are covered by the legal warranty of conformity, in accordance with Italian Legislative Decree No. 206/2005 (Consumer Code) and the Italian Civil Code (Articles 1490 et seq.), under the conditions set out below.

Warranty for Vacuum Tubes

Vacuum tubes, being components subject to wear and of vintage or specialized nature, are covered by a specific warranty of 6 (six) months from the date of delivery.
The warranty covers exclusively proven manufacturing or conformity defects that arise during proper use in accordance with technical specifications.

The warranty does not cover:

  • normal wear and tear,
  • subjective sound preferences,
  • use in incompatible equipment,
  • tampering or improper use.

Right of Withdrawal

Purchases made on the Vacuum Tubes Treasures website are governed by Italian regulations on distance contracts (Legislative Decree No. 206/2005).

Consumers have the right to withdraw from the contract within 14 (fourteen) days from the date of receipt of the goods, without providing any reason.

Conditions for Exercising the Right of Withdrawal

The right of withdrawal may be exercised only if:

  • the product has not been used,
  • the product is returned in its original condition,
  • the tamper-evident security seal is intact and not broken.

📌 Returns are not accepted for reasons related to sound preference, tube rolling, or subjective audio evaluation.
As with a music recording, a vacuum tube cannot be returned simply because its sound does not match personal taste.

Effects of Withdrawal

In the event of a valid withdrawal:

  • all payments received, including standard shipping costs, will be refunded,
  • refunds will be issued within 14 days from receipt of the returned goods,
  • the refund may be withheld until the goods have been received and inspected.

Refunds will be made using the same payment method used for the original transaction, unless otherwise agreed.

Return Shipping Costs

Return shipping costs are borne by the Customer, except in cases of:

  • verified defective products,
  • errors attributable to Vacuum Tubes Treasures.

In such cases, return shipping costs will be fully covered by us.

Damaged or Incorrect Items

If the Customer receives a damaged or incorrect item, it must be reported within 5 (five) working days from delivery, by email or telephone, clearly stating the issue.

Uncollected Parcels, Storage, and International Shipments

It is the Customer’s responsibility to monitor the shipment and promptly arrange for collection or customs clearance.
Any costs, delays, or losses resulting from:

  • failure to collect the parcel,
  • prolonged storage,
  • abandonment of the parcel at customs,

do not entitle the Customer to any refund.

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.