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6V6GT DELCO by Sylvania Black Plate Smoked Glass Foil Getter AMPLITREX Tested Tube USA 1952

6V6GT DELCO by Sylvania Black Plate Smoked Glass Foil Getter AMPLITREX Tested Tube USA 1952

318,00 RON
318,00 RON
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6V6GT DELCO by Sylvania Black Plate Smoked Glass Foil Getter Tube Made in USA 1952

AMPLITREX Tested – VERY STRONG - Vintage American Sylvania Production

Test Results:

Tube tested on AMPLITREX AT-1000 Tube Tester:

  • Test Conditions: Va = 250V; Vg2 = 250V; Vg = -12.5V
  • 100% Average: Gm = 4.1 ; Ia = 45 mA
  • Test Result: VERY STRONG

Tube : Gm = 3.97 ; Ia = 40.4 mA

Additional tests performed:
  • Microphonics: Low. Tested and confirmed for use in hi-fi equipment and guitar amplifiers, including the most sensitive audio stages.
  • Emission Quality: Excellent – Very strong and stable emission, without fluctuations.
  • Shorts and GAS: Absent.

Description:

Authentic 6V6GT Delco Made in USA, marketed under the historic Delco brand and manufactured by Sylvania Electric Products Inc. at the Emporium, Pennsylvania plant. An interesting American private-label production from the early fifties, capable of combining the charm of the Delco marking with the build quality of the famous Sylvania 6V6GTs.

The code 312 213 unmistakably identifies Sylvania and dates the manufacture to the 13th week of 1952. The tube features one of the most appreciated configurations of the period: black plate, smoked glass, and foil getter, accompanied by the large yellow Delco marking on the base and the 6V6GT label still clearly visible on the glass.

Tested on Amplitrex AT-1000, it recorded Gm 3.97 mA/V and Ia 40.4 mA. The transconductance reaches approximately 97% of the nominal value, while the plate current stands at around 90% of the reference: results that confirm strong, regular, and stable emission, particularly valid for a production dating back to 1952.

The tube passed all checks without showing fluctuations, gas, or shorts. The low microphonics allow for its use in hi-fi amplifiers, guitar amplifiers, and other vintage equipment compatible with the 6V6GT.

In terms of sound, Sylvania black plates from this era are generally appreciated for an open, dynamic, and natural presentation, with well-articulated mids, controlled low frequencies, and a defined high end. A musical and energetic performance, suitable both for single-ended configurations and as an element to complete a matched pair.

This is a used, tested, and perfectly functioning vintage tube. The markings are excellently preserved and the aesthetic condition is excellent, with only minimal signs of age. It is supplied in a custom Vacuum Tubes Treasures box.

A 1952 6V6GT of particular historical and collectible interest, enhanced by Delco branding, authentic Sylvania black plate construction, and still very solid Amplitrex performance.

Condition:

  • Status: Vintage Tubes - Tested and fully functional. Supplied in our custom box for optimal protection.
  • Functionality: Perfectly operational.
  • Aesthetic Condition: Excellent – Lettering excellently preserved, minimal signs of age. See photos for details.
  • Manufacturing Code: 312 213 → 312 Sylvania Electric Products Inc., Emporium, Pa. - 213 → 2 (from three digits) → 1952 - 13 → 13th week of the year

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.

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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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