• 12X4 RCA @ Test NOS Black Plates [] Getter Tube Rectifier Made in USA '57 - Vacuum Tubes Treasures
  • 12X4 RCA @ Test NOS Black Plates [] Getter Tube Rectifier Made in USA '57 - Vacuum Tubes Treasures
  • 12X4 RCA @ Test NOS Black Plates [] Getter Tube Rectifier Made in USA '57 - Vacuum Tubes Treasures
  • 12X4 RCA @ Test NOS Black Plates [] Getter Tube Rectifier Made in USA '57 - Vacuum Tubes Treasures
  • 12X4 RCA @ Test NOS Black Plates [] Getter Tube Rectifier Made in USA '57 - Vacuum Tubes Treasures
  • 12X4 RCA @ Test NOS Black Plates [] Getter Tube Rectifier Made in USA '57 - Vacuum Tubes Treasures
1 13

RCA

12X4 RCA NOS Black Plates Square Getter Tube Rectifier Made in USA '57

12X4 RCA NOS Black Plates Square Getter Tube Rectifier Made in USA '57

€19,90 EUR
€19,90 EUR
Sale Sold out
Taxes included. Shipping calculated at checkout.

12X4 RCA NOS Black Plates Square Getter Tube Rectifier Made in USA '57

Description:

The RCA 12X4, produced in the United States in 1957, is a miniature rectifier designed for reliability and quiet operation. This NOS version with black plates and a square getter is one of the most sought-after variants of the series, thanks to its robust construction and ability to provide a stable, linear power supply.

Sound characteristics

  • Bass : tight and dry, with excellent control and precision.
  • Medium : balanced and natural, with a clear rendering and free from unwanted colorations.
  • Highs : clear and well extended, with elegant and never aggressive detail.
  • Dynamics : fast and coherent, capable of ensuring continuity even in complex passages.
  • Soundstage : Clean and focused, with a stable soundstage and low background noise.

🎧 Hi-Fi use
Perfect as a rectifier for preamplifiers, tuners and vintage hi-fi equipment, the 12X4 RCA guarantees a linear and silent power supply, improving the overall sound output.

🎸 Use in Music Applications
Also suitable for instrument amplifiers, it provides a stable power supply that contributes to a warm, balanced sound with harmonic naturalness.

🎯 Note for audiophiles and collectors
The NOS 1957 RCA Black Plates Square Getter 12X4 is a premium and robust version, highly regarded for its ability to combine technical reliability and sound quality. An authentic piece for those who wish to preserve the original character of vintage American equipment.

Test Results:

Valve tested on Funke W19 Tube Tester:

  • Test Conditions: Va = 60V, Vf = 6.3V
  • Average 100%: Ia = 42 mA
  • Test Result: VERY STRONG

Valve:

  • Section 1: Ia = 47 mA
  • Section 2: Ia = 45 mA
Additional Tests Performed:
  • Microphonics: Very Low. 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:

  • Condition: NOS - New Old Stock - Tested and working - Supplied in our custom box for optimal protection.
  • Functionality: Fully functional.
  • Cosmetic condition: Excellent – Excellently preserved lettering, minimal signs of wear. See photos for details.
  • Manufacturing Code: 57 - ?? - Produced the ?? week of 1957

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
www.vtt.store | www.vacuumtubestreasures.com
📧 info@vacuumtubestreasures.com

View full details

  • 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.