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TUNG-SOL

6V6 GT DELCO by TUNG-SOL Black Glass Square Getter Tested Tube MADE IN USA '51

6V6 GT DELCO by TUNG-SOL Black Glass Square Getter Tested Tube MADE IN USA '51

€69,90 EUR
€69,90 EUR
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6V6GT DELCO by TUNG-SOL Black Glass Square Getter Tested Tube MADE IN USA '51 AMPLITREX Tested Tube

General Description

The 1951 6V6GT DELCO by TUNG-SOL Black Glass represents one of the most authentic expressions of American post-war production. Manufactured by Tung-Sol for DELCO, this tube combines high industrial quality with a construction typical of the most sought-after series, featuring Black Glass and Square Getter, distinguishing elements of the finest productions of that era.

The black glass is not just an aesthetic choice; it contributes to better emission management and more stable performance over time. The manufacturing code 322 112 confirms Tung-Sol production, synonymous with reliability and manufacturing consistency.

This is a used but selected and tested tube, which fully retains the charm and musicality of 1950s American 6V6s.

Tested with Amplitrex AT-1000, it delivered a STRONG result, confirming excellent operational performance.

Sound Characteristics

Bass

Warm and round, with a rich texture typical of the best Tung-Sol productions. Never overwhelming, but always well-articulated.

Midrange

Rich and engaging, with a natural harmonic texture. Voices emerge with realism and depth.

Treble

Sweet and refined, never aggressive. They offer detail without fatigue, maintaining fluid musicality.

Dynamics

Progressive and musical, with an organic response that enhances the naturalness of the signal.

Soundstage

Wide and three-dimensional, with good separation and credible instrument placement.

🎧 Use in Hi-Fi Amplifiers

This 6V6GT is ideal for systems where a warm, musical, and engaging sound, typical of 1950s American tubes, is desired.

Particularly suitable for:

  • single-ended amplifiers
  • vintage configurations
  • systems oriented towards musicality rather than pure analytical precision

🎸 Use in Musical Applications

In guitar applications, it offers:

  • soft and progressive breakup
  • great expressiveness in the mids
  • natural dynamic response

Perfect for those seeking the classic "vintage American tone."

🎯 Note for audiophiles and technicians

  • Manufacturer: Tung-Sol (DELCO branded)
  • Year: 1951
  • Construction: Black Glass – Square Getter
  • Factory code: 322 112
  • Test: AMPLITREX AT-1000

A tube with strong historical and sonic character, capable of offering an authentically American voice, ideal for those who desire a warm, natural sound rich in personality.

Test Results:

Tube tested on AMPLITREX AT-1000 Tube Tester:

  • Test Conditions: Va = 250V; Vg2 = 250V; Vg = -12.5V 
  • Measurements taken after 10 minutes of warm-up.
  • Average 100%: Gm = 4.1 ; Ia = 45 mA
  • Test Result: STRONG

Tube : Gm = 4.1 ; Ia = 37 mA

Additional Tests Performed:
  • Microphonics: Low. Tested and suitable for use in hi-fi, including phono stages and guitar amplifiers.
  • Emission Quality: Excellent – Strong and stable emission, without fluctuations.
  • Short Circuits and GAS: Absent.

Condition:

  • Condition: Vintage Tubes - Tested and fully functional. Supplied in our custom box for optimal protection. 
  • Functionality: Fully operational, with excellent test results.
  • Cosmetic condition: Very Good – lettering clearly legible. There is a small crack on the plastic base, visible in the photos. This is an exclusively aesthetic defect that does not affect functionality, as confirmed by tests. See photos for details.
  • Manufacturing code: 322 112 - 322 → Tung-Sol Electric Inc., Newark 4, N. J. - 112 → RMA/EIA Open Date Code → manufactured in the 12th week of 1951

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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📧 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.