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SYLVANIA

6SN7 GTA NOS SYLVANIA CHROME TOP Matched Pair Same Code AMPLITREX Low Noise Tubes

6SN7 GTA NOS SYLVANIA CHROME TOP Matched Pair Same Code AMPLITREX Low Noise Tubes

€179,90 EUR
€179,90 EUR
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6SN7GTA NOS SYLVANIA – Chrome Top – Matched Pair – Same Data Codes – Made in USA 1954

AMPLITREX Tested – VERY STRONG – Low Noise & Microphonics

Description

We present an excellent matched pair of 6SN7GTA Sylvania NOS, produced in the United States in 1954, belonging to the renowned Chrome Top variant, among the most sought after by enthusiasts.

These tubes represent one of the most iconic expressions of Sylvania's 1950s production: extremely meticulous construction, high-quality materials, and a sound reproduction that has made them a benchmark in the audio world.

The Chrome Top is not just a distinctive aesthetic element, but indicates a high-level production, with excellent vacuum quality and operational stability over time.

Tested with Amplitrex AT-1000, they are VERY STRONG and Low Noise & Microphonics

An ideal selection for high-level hi-fi applications and for applications where maximum reliability is required.

Sound Character

Bass: Deep, solid, and well-controlled, with excellent structure and presence without excess.

Mids: Rich, three-dimensional, and natural. Vocals emerge with great realism and a typically American timbre, warm yet detailed.

Highs: Sweet, refined, and well-extended. Never fatiguing, they contribute to a fluid and musical listening experience.

Dynamics: Wide and natural, with a fast but always balanced response, capable of following every musical nuance.

Soundstage: Wide and airy, with excellent instrument separation and a credible and deep soundstage.

🎧 Use in Hi-Fi Stereo Amplifiers

Suitable for:

  • Tube preamplifiers (even high-end)
  • Driver stages
  • OTL amplifiers

Thanks to their low noise and careful selection, they are also suitable for the most sensitive positions in the circuit.

🎸 Use in Musical Amplifiers

Perfect for:

  • Instrument amplifiers
  • Tube preamplifiers

They offer a full, musical, and dynamic sound, with a particularly pleasing harmonic response.

🎯 Note for Audiophiles and Technicians

The Sylvania Chrome Top from the 1950s are particularly appreciated for:

  • timbral balance
  • natural musicality
  • long-term reliability

This pair, thanks to its matching and test conditions, represents a high-level choice for both critical listening and valuable systems.

A NOS pair that combines historical prestige, construction quality, and sound reproduction, ideal for those who want the best from the 6SN7 family.

Test Results:

Tubes tested on Amplitrex AT-1000 Tube tester:

  • Test Conditions: Va = 250V, Vg = -8V
  • Average 100% Gm = 2600 ; Ia = 9.0 mA
  • Test Result: VERY STRONG

Tube #18

  • Section 1: Gm = 2500 ; Ia = 7.0 mA
  • Section 2: Gm = 2570 ; Ia = 7.4 mA

Tube #5

  • Section 1: Gm = 2500 ; Ia = 7.4 mA
  • Section 2: Gm = 2540 ; Ia = 7.6 mA

Additional Tests:

  • Microphonics and Noise: Tested and suitable for hi-fi use, including phono stages and guitar amplifiers. Also suitable for V1.
  • Balance: The sections are consistent and well-aligned, making the tube suitable for use as a phase inverter in hi-fi and instrumental applications.
  • Emission: Excellent – Very strong and stable emission, without fluctuations.
  • Shorts / Gas: absent

Condition

  • Condition: NOS - New Old Stock - Tested and working - Supplied in our custom box for optimal protection.
  • Functionality: Fully operational
  • Cosmetic condition: Excellent – Markings are well-preserved, minimal signs of age. See photos for details.
  • Manufacturing code: Sylvania Electric Products Inc., Emporium (PA) – code 413 → 13th week of 1954

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.