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INTERNATIONAL

5U4GB 5AS4A International by GE NOS NIB Gray Plates Side Square Getter Tube Rectifier Made in USA

5U4GB 5AS4A International by GE NOS NIB Gray Plates Side Square Getter Tube Rectifier Made in USA

27.600 HUF
27.600 HUF
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Taxes included. Shipping calculated at checkout.

5U4GB 5AS4A International by GE NOS NIB Gray Plates Side Square Getter Tube Rectifier Made in USA

Note: Price refers to one selected valve

Description:

The 5U4GB / 5AS4A , manufactured in the USA by General Electric (GE) and distributed under the International brand, is offered in NOS NIB (New Old Stock, New in Box) condition.
This valve features gray plates and a side square getter , a typical configuration of GE production from the 1970s, synonymous with robustness and reliability.

Timbre and performance characteristics

  • Bass : Deep and well controlled, with precise articulation.
  • Mids : Balanced and transparent, with clear vocals and well-defined acoustic instruments.
  • Highs : clean and fluid, never aggressive, with natural brilliance.
  • Dynamics : prompt and stable, with constant power delivery even at full load.
  • Soundstage : tidy and coherent, with stable and precise sound imaging.

🎧 Use in Hi-Fi Stereo Amplifiers

Perfect for high-end tube amplifiers (McIntosh, Dynaco, Audio Research and the like), the 5U4GB GE offers reliable, linear power delivery, enhancing the system's tonal balance and transparency.

🎸 Use in Music Amplifiers

In guitar amplifiers, it ensures stable headroom and a natural harmonic tone, with warm sustain and dynamic responsiveness, perfect for blues, jazz and vintage rock.

🎯 Note for audiophiles and technicians

This 5U4GB / 5AS4A GE Gray Plates Side Square Getter , in NOS NIB condition, represents a solid and reliable choice. It is the ideal component for ensuring long life and high-level performance, both in hi-fi and musical instruments.

Test Results

Tubes Tested on Funke W19 Tube Tester:

Voltage Test: Va = 100V, Vf = 5V
Good from: Ia = 78 mA
Average 100%: Ia = 120 mA
TEST RESULT: VERY STRONG

Valve 1 :

  • Section 1 : Ia = 150 mA
  • Section 2 : Ia = 145 mA

Valve 2 :

  • Section 1 : Ia = 145 mA
  • Section 2 : Ia = 145 mA

Additional Tests Performed:
  • Operation: Stable valve, quiet in operation, and suitable for regular and controlled power supply. Tested with a Funke W19 tester.
  • Output Quality: Excellent – ​​Very strong and stable output, no fluctuations.
  • Short circuits and GAS: Absent.

Conditions:

  • Condition: NOS - NIB - New Old Stock, New In Box - Tested and working - Supplied in original box.
  • Functionality: Fully functional.
  • Aesthetic condition: Very good – Clearly legible writing with minor signs of wear, no obvious defects. See photos for details.
  • Manufacturing Code: Unreadable – GE USA production, identifiable by construction features. 1970s

Find out why our valves 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
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📧 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.