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RCA

5V3A 5AU4 RCA NOS NIB Black Plates Round Getter Rectifier Tube - Amplitrex Tested - Made in USA

5V3A 5AU4 RCA NOS NIB Black Plates Round Getter Rectifier Tube - Amplitrex Tested - Made in USA

€22,00 EUR
€22,00 EUR
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5V3A 5AU4 RCA NOS NIB Black Plates Round Getter Rectifier Tube - Amplitrex Tested - Made in USA

Description:

The RCA 5V3A / 5AU4 , made in the USA, is a double half-wave rectifier developed to ensure robustness and stability of power supplies in hi-fi amplifiers, broadcast equipment and professional systems.
This example is NOS NIB (New Old Stock – New in Box) and features black plates with round getters , a typical configuration of high-end RCA productions.
It has been thoroughly tested with Amplitrex AT-1000 , ensuring strong output, no shorts and full operational efficiency.

Timbral characteristics and sound behavior

Bass: full and controlled, with a solid base that gives authority to the sound, without unwanted bloat.

Mids: Transparent and natural, with well-defined voices and acoustic instruments rendered with harmonic richness.

Highs: smooth and airy, free from harshness, with a clear extension that gives brilliance to the soundstage.

Dynamics: fast and coherent, capable of rendering both micro details and the most complex peaks with stability.

Soundstage: wide, stable and three-dimensional, with well-defined instrument separation and a silent background.

🎧 Use in Hi-Fi amplifiers

Ideal for high-end stereo amplifiers and vintage preamps, where the stability of the rectification contributes to a more dynamic, detailed and noise-free sound.

🎸 Use in musical instrument amplifiers

Perfect for instrument amplifiers and vintage organs, where it provides stable current, increased headroom and a clean, focused sound output.

🎯 Note for audiophiles and technicians

The RCA 5V3A / 5AU4 Black Plates with round getter is a rectifier highly appreciated for its ability to combine electrical reliability and elegant musical performance .
The proposed specimen is NOS NIB and Amplitrex Tested , to guarantee full functionality, uniformity and long life.
An excellent option for both philological restorations and high-end hi-fi systems .

Test Results:

Valves tested on Amplitrex AT-1000 Tube tester:

  • Test Conditions: Va = 278V, Vf = 5V
  • Direct drop: 23–24 V peak (balanced sections)
  • Reverse hold: 396–397 V peak (excellent)
  • Test Result: VERY STRONG

Plate current:

Valve:

  • Section 1: Ia = 120 mA
  • Section 2: Ia = 120 mA

Plate current:

Additional Tests

  • Microphonics: Standard. Tested and approved for use in hi-fi and guitar amplifiers.
  • Output Quality: Excellent – Very strong and stable output, no fluctuations.
  • Short circuits and GAS: Absent.

Conditions:

  • Conditions: NOS - NIB - New Old Stock, New In Box - Tested and working - Supplied in original box.
  • Functionality: Fully functional.
  • Cosmetic condition: Excellent – Excellently preserved lettering, minimal signs of wear. See photos for details.
  • Manufacturing Code: BP - Manufactured in July 1967

 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.