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RCA

6SN7 GT RCA Radiotron Smoked Glass Matched Pair Silver Logo Black Plates D Getter AMPLITREX Tested Low Noise Tubes

6SN7 GT RCA Radiotron Smoked Glass Matched Pair Silver Logo Black Plates D Getter AMPLITREX Tested Low Noise Tubes

€159,90 EUR
€159,90 EUR
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6SN7 GT RCA Radiotron Smoked Glass Matched Pair Silver Logo Black Plates D Getter - Made In USA - 1942

AMPLITREX Tested – VERY STRONG – Low Noise & Microphonics

Test Results:

Tubes tested on Amplitrex AT-1000 Tube tester:

  • Test Conditions: Va = 250V, Vg = -8V
  • Average 100% Gm = 2600 ; Ia = 9.0 mA
  • Test Result: VERY STRONG

Tube #1

  • Section 1: Gm = 2700 ; Ia = 9.4 mA
  • Section 2: Gm = 2900 ; Ia = 9.2 mA

Tube #2

  • Section 1: Gm = 2700 ; Ia = 7.8 mA
  • Section 2: Gm = 2900 ; Ia = 8.8 mA

Description

Extremely rare matched pair of 6SN7GT RCA Radiotron, produced in the United States in 1942, belonging to the very first generation of the renowned 6SN7. The construction with Smoked Glass, Silver Logo, Black Plates, and bottom D Getter identifies a very early configuration, highly sought after by collectors and audiophiles today.

These specimens fully represent the quality of RCA production from the early 1940s, with robust construction, selected materials, and internal geometry typical of the first American 6SN7s. The presence of smoked glass and the D getter also contributes to making this pair visually and historically very interesting.

The pair has been carefully tested and selected in our laboratory using the Amplitrex AT-1000 Tube Tester, achieving a VERY STRONG classification. Both tubes were found to have Low Noise & Microphonics and show good balance between sections, with stable and consistent electrical behavior.

Sonically, the early RCA 6SN7GTs are appreciated for their authoritative, natural, and three-dimensional reproduction, with full and controlled bass, rich and textured mids, smooth but well-defined high frequencies, and a wide, deep, and very stable soundstage. The overall character is musical, fluid, and refined, with that combination of body, naturalness, and spaciousness typical of the best RCA productions of the era.

Ideal for hi-fi preamplifiers, driver stages, phase splitters, headphone amplifiers, and all equipment compatible with 6SN7GT that requires a high-quality matched pair.

The tubes are Vintage, carefully tested, and fully functional. The aesthetic conditions are excellent, with well-preserved lettering and minimal signs of aging.

A rare matched pair of authentic RCA Radiotron 6SN7GT Smoked Glass from 1942, genuinely tested and selected by Vacuum Tubes Treasures, ideal for those seeking one of the most fascinating and musically appreciated American productions of the early 6SN7 era.

Additional Tests:

  • Microphonics and noise: Low. Tested and suitable for use in hi-fi equipment and guitar amplifiers, even in the most sensitive audio stages.
  • Balance: Sections are consistent and well-matched, making the tube suitable for use as a phase inverter in hi-fi and instrumental applications.
  • Emission: Excellent – Very strong and stable emission, without fluctuations.
  • Shorts / Gas: absent

Condition

  • Condition: Vintage Tubes - Tested and fully functional. Supplied in our custom box for optimal protection.
  • Functionality: Fully operational
  • Aesthetic condition: Excellent – Lettering is well-preserved, minimal signs of aging. See photos for details.
  • Manufacturing code: RCA S3 and S5, traceable to 1942: May–June and September–October respectively. The vintage construction, with black plates, bottom D getter, and smoked glass, is fully consistent with this period.

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
www.vtt.store | www.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.