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RCA

6V6G RCA Radiotron Matched Pair - Smoked Glass Black Plates Foil Getter - Same Factory Code - USA '50s - AMPLITREX Tested

6V6G RCA Radiotron Matched Pair - Smoked Glass Black Plates Foil Getter - Same Factory Code - USA '50s - AMPLITREX Tested

$263.00 USD
$263.00 USD
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6V6G RCA Radiotron – Matched Pair – Smoked Glass – Black Plates – Foil Getter – USA ’50s

Same Factory Code XE5 – AMPLITREX Tested – Matched Pair – Low Noise & Microphonics

General Description

This pair of 6V6G RCA Radiotron – Made in USA in the 1950s represents one of the most authentic expressions of vintage American production, appreciated for its construction, musicality, and long-term reliability.

The presence of the XE5 factory code on both tubes allows for a conservative dating around September/October 1954, a detail of particular interest to collectors and enthusiasts.

The construction configuration is among the most sought-after:

  • Smoked Glass
  • Black Plates
  • Foil Getter
  • production RCA Radiotron USA

This combination identifies a tube with a rich and full-bodied sonic character, typical of true first-generation American 6V6s.

The pair has been selected and matched using an Amplitrex AT-1000, resulting in a true matched pair, with extremely close values and consistent electrical behavior.

Sound Characteristics

The 6V6G RCA Radiotron tubes are distinguished by a warm, natural, and engaging presentation, with a rendition that prioritizes musicality without sacrificing control.

Bass

Full-bodied and well-articulated, with a solid yet always controlled presence. They offer a stable harmonic foundation, without excess.

Mids

Rich and full-bodied, with a particularly pleasing rendition for vocals and acoustic instruments. The timbre is natural and fluid.

Highs

Sweet and refined, never aggressive. The extension is balanced and contributes to an overall harmonious rendition.

Dynamics

Smooth and progressive, with a natural and never forced transient response. Excellent ability to follow the signal consistently.

Soundstage

Broad and credible, with good depth and well-defined instrument separation.

🎧 Use in Hi-Fi Amplifiers

This pair is perfectly suited for:

  • single-ended and push-pull amplifiers
  • compatible vintage and modern systems
  • contexts where musicality and naturalness are sought

The consistency between the tubes and RCA's build quality ensures stable and reliable performance.

🎸 Use in Musical Applications

In musical contexts, these 6V6G tubes offer:

  • progressive dynamic response
  • natural and musical breakup
  • excellent handling of expressive nuances

Particularly suitable for guitar amplifiers where a warm, full, and organic sound is desired.

🎯 Note for Audiophiles and Technicians

  • RCA Radiotron – Made in USA 1950s
  • Code XE5 – same manufacture (circa 1954)
  • Smoked Glass – Black Plates – Foil Getter
  • True Matched Pair (selected on Amplitrex)

A pair that embodies the charm and substance of classic RCA production, ideal for those seeking consistency, musicality, and sonic authenticity, capable of restoring the authentic voice of American RCA tradition.

Test Results:

Tube tested on AMPLITREX AT-1000 Tube Tester:

  • Test Conditions: Va = 250V; Vg2 = 250V; Vg = -12.5V 
  • Measurements taken after 10 minutes of warm-up.
  • Average 100%: Gm = 4.1 ; Ia = 45 mA
  • Test Result: STRONG

Tube 1: Gm = 3.49 ; Ia = 37.6 mA

Tube 2: Gm = 3.57 ; Ia = 36.4 mA

Additional Tests Performed:
  • Microphonics: Low. Tested and compliant for use in hi-fi, including phono stages, and in guitar amplifiers.
  • Emission Quality: Excellent – Very strong and stable emission, without fluctuations.
  • Shorts and GAS: Absent.

Conditions:

  • Condition: Vintage Tubes - Tested and fully functional. Supplied in our custom box for optimal protection. 
  • Functionality: Perfectly operational, with excellent test results.
  • Cosmetic Condition: Excellent – Markings excellently preserved, minimal signs of age. See photos for details.
  • Manufacturing Code: XE5 - Made in USA - likely in 1954, code XE5

Discover why our tubes 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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  • 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.

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    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.