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ZENITH

5V4G GZ32 ZENITH Black Plates Bottom Foil Dimpled Getter Tested Tube Made in USA '50s

5V4G GZ32 ZENITH Black Plates Bottom Foil Dimpled Getter Tested Tube Made in USA '50s

€89,90 EUR
€89,90 EUR
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5V4G GZ32 ZENITH Black Plates Bottom Foil Dimpled Getter Tested Tube Made in USA '50s

Description:

The 5V4G / GZ32 Zenith, produced in the United States in the 1950s and presented here in the classic configuration with black plates, dimpled foil getter in the bottom position, and a robust internal structure, represents one of the most musical and stable interpretations among American rectifier tubes of those years, likely manufactured by RCA or Sylvania on behalf of Zenith.

Appreciated for its lower voltage drop compared to the 5U4G and for its natural soft start, this tube is particularly suitable for tube preamplifiers, integrated amplifiers, and hi-fi driver stages that benefit from well-regulated voltage and a progressive power-on curve.

Bass: articulated and harmonic. The low-frequency response is warmer and rounder than the 5U4GB, with less deep but more "musical" extension. Ideal for systems seeking density and naturalness rather than impact and rigid control.

Mids: sweet and harmonious. The tonal heart of this tube lies in the mid-frequencies, which are velvety, organic, and light, with a particularly charming vocal rendition. Perfect for jazz, chamber classical, and acoustic reproductions.

Highs: silky and delicate. The upper part of the spectrum develops gracefully, without forcing. Detail is present but never aggressive, with a fine grain that enhances micro-information and contributes to a refined and non-fatiguing listening experience.

Dynamics: soft but coherent. The dynamic behavior is more "elastic" compared to low-internal resistance rectifiers like the GZ34, but precisely for this reason, it is more musical in low-power systems, with a gentle transition between energy levels.

Soundstage: wide and enveloping. The soundstage develops with depth and a sense of ambiance, revealing natural reverberations and spatial information that make the stage credible and immersive.

🎧 Use in Headphone Amplifiers and Hi-Fi Driver Stages
The 5V4G Zenith is particularly suited for refined, low-power systems where it can best express its tonal refinement and its ability to promote three-dimensionality. Ideal for tube DACs, power supplies for line stages, and high-sensitivity headphone amplifiers.

🎸 Use in Guitar and Bass Amplifiers
Less common in guitar applications than the 5U4G or GZ34, but perfect for low-power vintage amps or studio guitars, where a sweet response, gradual musical sag, and natural harmonic transitions with well-controlled compression are desired.

🎯 Note for Audiophiles and Technicians
A tube with a poetic and transparent character, suitable for high-sensitivity systems and for those who desire a more analog and less analytical reproduction. Its classic structure and black plates also make it an aesthetically fascinating choice for vintage restorations or custom builds.

Test Results

Tubes Tested on Funke W19 Tube Tester:

Voltage Test: Va = 60V, Vf = 5V
Good from: Ia = 55 mA
Average 100%: Ia = 84.6 mA
TEST RESULT: STRONG

Tube:

  • Section 1: Ia = 60 mA
  • Section 2: Ia = 61 mA

Additional Tests Performed:
  • Functionality: Stable tube, quiet in operation, and suitable for regular and controlled power supply. Test performed with Funke W19 tester.
  • Emission Quality: Excellent – Very strong and stable emission, without fluctuations.
  • Shorts and GAS: Absent.

Condition:

  • Condition: Vintage Tube - Tested and perfectly functional. Supplied in our custom box for optimal protection.
  • Functionality: Perfectly operational.
  • Cosmetic Condition: Very Good – Legible lettering with slight signs of age, no obvious defects. See photos for details.
  • Manufacturing Code: M-R - Code not decipherable. Manufacturing year determined by internal structure. 1950s manufacturing.

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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.