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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

10.300 ISK
10.300 ISK
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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 →

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.