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SYLVANIA

6SN7GTB Baldwin by SYLVANIA Matched Pair Black Plates Tubes - Same Codes - Made in USA '61

6SN7GTB Baldwin by SYLVANIA Matched Pair Black Plates Tubes - Same Codes - Made in USA '61

427,00 RON
427,00 RON
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6SN7GTB Baldwin by SYLVANIA – Matched Pair – Same Data Codes – Made in USA 1961

AMPLITREX Tested – VERY STRONG – Low Noise & Microphonics - Vintage American Sylvania Production

General Description

This matched pair of 6SN7GTB Baldwin by Sylvania, Made in USA 1961 production, represents a very interesting selection of American Sylvania production intended for Baldwin supplies, a brand historically linked to musical and professional applications.

The tubes are used, but carefully tested, selected and matched in our laboratory as a Matched Pair. The presence of same data codes on both tubes is a positive element, as it indicates batch consistency and greater production and aesthetic uniformity.

The construction is typical Sylvania of the era, with black plates, top halo getter, top getter flashing, black base and a still legible green Baldwin silk-screen print. The general aesthetic conditions are excellent, with minimal signs consistent with age and vintage use. See photos for details.

The pair was tested on an Amplitrex AT-1000 Tube Tester with a VERY STRONG result and was selected as Low Noise & Microphonics, making it particularly interesting for audio applications where stability, quietness, and channel consistency are important elements.

Sonic Characteristics

Bass

Solid, orderly, and well-controlled. The low range maintains good structure without being excessive, offering support and naturalness to musical reproduction.

Mids

Full, musical, and well-present. Vocals and acoustic instruments sound credible, with a pleasant harmonic texture and a typically American tonal rendition.

Highs

Clean, balanced, and well-integrated. The high end maintains good openness without becoming aggressive, promoting smooth and natural listening.

Dynamics

Stable and responsive, with good ability to follow musical passages without stiffness. The very strong electrical behavior contributes to an authoritative and well-controlled performance.

Soundstage

Stable and coherent, favored by the matching between the two tubes and their origin from the same batch. The sound image is orderly, with good instrument separation and a balanced presentation between channels.

🎧 Use in Hi-Fi Amplifiers

This pair of 6SN7GTB Baldwin by Sylvania is suitable for preamplifiers, driver stages, phase splitters, and compatible hi-fi circuits that require a stable, quiet, and musically balanced 6SN7.

The VERY STRONG result, accurate matching, and Low Noise & Microphonics selection make it particularly suitable for systems where channel coherence, low noise, microphonics control, and operational reliability are important.

The Low Noise & Microphonics selection also makes it suitable for sensitive hi-fi applications, always subject to verification of the technical compatibility of the equipment and the circuit position in which it will be used.

🎸 Use in Musical Applications

In instrument amplifiers and compatible circuits, this pair can offer a full, controlled, and dynamically stable response. The Sylvania construction with black plates and halo getter contributes to a solid, musical, and well-defined sound character.

It is an interesting choice for those seeking a vintage American 6SN7GTB pair with good robustness, balanced response, low noise, and predictable behavior in compatible musical applications.

🎯 Note for Audiophiles and Technicians

This pair combines several important elements:

Sylvania Made in USA 1961 production

  • Baldwin selection
  • same data codes
  • black plates / halo getter construction
  • real test on Amplitrex AT-1000
  • VERY STRONG result
  • real matching between two tubes
  • Low Noise & Microphonics selection

A pair designed for those who want a vintage American 6SN7GTB that is not generic, but genuinely selected, tested, and ready for compatible hi-fi and musical applications where good electrical consistency, low noise, microphonics control, and vintage Sylvania sound character are required.

Test Results:

Tubes tested on Amplitrex AT-1000 Tube tester:

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

Tube #16:

  • Section 1: Gm = 2500 ; Ia = 8.4 mA
  • Section 2: Gm = 2600 ; Ia = 9.8 mA

Tube #12:

  • Section 1: Gm = 2600 ; Ia = 9.0 mA
  • Section 2: Gm = 2600 ; Ia = 9.2 mA
Additional Tests Performed:
  • Microphonics: Low. Tested and suitable for hi-fi use, including in phono stages and guitar amplifiers. Also suitable for V1.
  • Emission Quality: Excellent – Very strong and stable emission, without fluctuations.
  • 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: Excellent – Markings well preserved, minimal signs of age. See photos for details.
  • Manufacturing Code: 312 113 - 312 → Sylvania Electric Products Inc., Emporium, Pa. - 113 → 1 ( three digits ) → 1961 - 13 → 13th week of the year

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.