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TUNG-SOL

6V6GT NOS TUNG-SOL Black Glass Matched Pair Tubes Square Getter Same Codes Made in USA '55

6V6GT NOS TUNG-SOL Black Glass Matched Pair Tubes Square Getter Same Codes Made in USA '55

CHF 180.00
CHF 180.00
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6V6GT NOS TUNG-SOL – Black Glass – Matched Pair – Square Getter – Same Codes – Made in USA 1955

AMPLITREX Tested – VERY STRONG

General Description

This matched pair of 6V6GT NOS TUNG-SOL, produced in the United States in 1955, represents one of the most iconic and sought-after versions of the American 6V6 family.

The tubes feature the famous construction:

  • Black Glass
  • Square Getter
  • typical Tung-Sol internal structure from the 1950s

The black glass is particularly appreciated for the quality of its materials and its distinctive sonic character, while the square getter identifies early production, which is increasingly rare today.

Both tubes bear the same manufacturing code 322539-3, confirming their origin from the same production batch.

The pair is NOS (New Old Stock) and has been selected as a Matched Pair.

Sonic Characteristics

TUNG-SOL 6V6GT Black Glass from the 1950s are considered among the best overall for musicality and character.

Bass

Deep and well-structured, with excellent control and natural presence.

Mids

Rich, warm, and three-dimensional. Vocals are extremely natural and engaging.

Treble

Sweet and refined, with a smooth texture that avoids any harshness.

Dynamics

Smooth and progressive, with a very musical and natural response.

Soundstage

Wide and well-developed, with excellent depth and separation.

🎧 Use in Hi-Fi Amplifiers

Ideal for amplifiers based on:

  • 6V6GT / 6V6G / 6V6GTY

Particularly suitable for hi-fi systems seeking:

  • musicality and naturalness
  • rich midrange
  • warm and engaging sound

The matching and electrical consistency ensure stable performance in push-pull circuits.

🎸 Use in Musical Applications

Also highly valued in guitar amplifiers for:

  • soft and progressive breakup
  • warm and harmonically complex mids
  • very expressive dynamic response

A classic choice for those who desire an authentic vintage sound.

🎯 Note for audiophiles and technicians

  • Tung-Sol – Made in USA – 1955
  • Black Glass – Square Getter
  • Same Factory Code: 322539-3
  • Matched Pair
  • NOS – New Old Stock
  • AMPLITREX Tested – VERY STRONG

A valuable pair, combining rarity, construction quality, and sonic performance, ideal for those who desire a reference vintage 6V6GT, with the charm and musicality of 1950s American production.

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: VERY STRONG

Tube 1: Gm = 4.2 ; Ia = 48.5 mA

Tube 2: Gm = 4.3 ; Ia = 47.4 mA

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

Condition:

  • Status: NOS - New Old Stock - Tested and functional - Supplied in our custom box for optimal protection.
  • Functionality: Perfectly operational, with excellent test results.
  • Aesthetic condition: Excellent – Markings well preserved, minimal signs of age. See photos for details.
  • Manufacturing code: 322539-3 - 322 → Tung-Sol Electric Inc., Newark 4, N. J. - 539 → RMA/EIA Open Date Code → manufactured in the 39th week of 1955

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.

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.