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AMPEREX

6SL7GT AMPEREX GLOBE AMPLITREX Tested Pair Black Plates Square Getter Tubes USA 60s

6SL7GT AMPEREX GLOBE AMPLITREX Tested Pair Black Plates Square Getter Tubes USA 60s

2.113,00 CZK
2.113,00 CZK
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6SL7GT AMPEREX GLOBE AMPLITREX Tested Pair Black Plates Square Getter Tubes USA 60s

Description
This pair of 6SL7GT AMPEREX GLOBE , USA production from the 1960s , is a version of great historical and sonically interest, made by RCA for the Amperex Company . These examples feature black plates , square getters and the characteristic smoked glass , typical elements of the best RCA productions of the time destined for leading brands such as Amperex.
The tubes have been tested with the Amplitrex AT-1000 and both are in TEST VERY STRONG conditions, with high output, stable operation and no shorts or gas.

Sound Characteristics

The 6SL7 RCA black plates with smoked glass are appreciated for their rich, authoritative and very musical tone, with a very recognizable classic American character.

Bass
Full, solid, and well-controlled. The low end has body and depth, while maintaining good articulation and stability.

Medium
Warm, dense, and highly expressive. Vocals sound natural and present, with a particularly convincing performance on jazz, blues, and vocal music.
The midrange is one of the strong points of this RCA configuration.

High
Smooth, fluid, and never aggressive. The smoked glass contributes to an elegant and slightly silky presentation, with a well-integrated, harsh-free finish.

Dynamics
Robust and progressive. The response is energetic but controlled, with a very musical behavior consistent with the VERY STRONG state of the tubes.

Soundstage
Wide and three-dimensional, with good depth and separation of musical lines. The soundstage is stable and natural, typical of the best American 6SL7s of the 1960s.

🎧 Use in Hi-Fi Stereo Amplifiers
Suitable for:

  • tube preamplifiers,

  • input and driver stages,

  • Vintage American and European amplifiers using 6SL7s.

The warm and authoritative timbre makes them ideal for jazz, vocal, classical and prolonged listening, as long as a perfect balance between the two tubes is not required.

🎸 Use in Music Amplifiers
Excellent for:

  • guitar and bass amplifiers with 6SL7,

  • vintage circuits and boutiques,

  • positions where character, body and rich harmonics are sought.

Microphonics: Standard. Recommended for use in V2, V3, V4, as a driver or in less critical stages. Not recommended for V1.

🎯 Note for audiophiles and technicians

A premium choice for enthusiasts, restorers, and musicians seeking authentic 1960s RCA tone, with the allure of the Amperex Globe brand.

Test Results:

Valves tested on Amplitrex AT-1000 Tube tester :

  • Test Conditions: Va = 250V, Vg = -2V
  • Average 100% Gm = 1600 ; Ia = 2.3 mA

Valve 1:

  • Section 1: Gm = 1700 ; Ia = 2.3 mA
  • Section 2: Gm = 1700 ; Ia = 2.5 mA

Valve 2:

  • Section 1: Gm = 1400 ; Ia = 2.0 mA
  • Section 2: Gm = 1500 ; Ia = 2.1 mA
Additional Tests Performed:
  • Microphonics: Standard. Tested and approved for use in hi-fi and guitar amplifiers. Recommended for use in V2, V3, V4, as a driver, or in less critical stages. Not recommended for use in V1.
  • Balance: The two sections show coherent and well-aligned values, making the valve also ideal as a phase inverter in hi-fi and instrumental applications.
  • Output Quality: Excellent – Very strong and stable output, no fluctuations.
  • Short circuits and GAS: Absent.

Conditions:

  • Condition: Vintage Valves - Tested and in perfect working order - Supplied in original box.
  • Functionality: Fully functional.
  • Cosmetic condition: Excellent – Excellently preserved lettering, minimal signs of wear. See photos for details.
  • Manufacturing Code: None – Made by RCA USA for AMPEREX, identifiable by its construction features. 1960s

Find out why our valves 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.