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SYLVANIA

JAN-CHS-6SN7W SYLVANIA US Navy Black Bakelite Base Tall Bottle Black T-Plates Chrome Top USA

JAN-CHS-6SN7W SYLVANIA US Navy Black Bakelite Base Tall Bottle Black T-Plates Chrome Top USA

₩205,000 KRW
₩205,000 KRW
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JAN‑CHS‑6SN7W SYLVANIA US Navy Black Bakelite Base Tall Bottle Black T‑Plates Chrome Top - Made in USA

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

  • Section 1: Gm = 2300 ; Ia = 8.0 mA
  • Section 2: Gm = 2500 ; Ia = 8.6 mA

Description

Rare and sought-after JAN‑CHS‑6SN7W Sylvania of U.S. military production, manufactured for U.S. Navy supply, as confirmed by the JAN‑CHS designation and the characteristic anchor mark visible on the base. The 6SN7W version represents one of the most highly regarded professional variants of the 6SN7 family, built to strict specifications to offer robustness, stability, and reliability under demanding operating conditions.

This specimen features the prestigious Tall Bottle, Black T‑Plates, Chrome Top, and black bakelite base configuration. A construction style that is instantly recognizable and highly sought after by collectors of American tubes, combining great historical interest, remarkable build quality, and excellent performance in audio applications. Based on its construction characteristics, production is indicatively attributable to the 1950s.

The tube has been accurately measured with an Amplitrex AT‑1000. The two sections recorded Gm 2300 / Ia 8.0 mA and Gm 2500 / Ia 8.6 mA respectively, values that confirm very strong emission and good overall balance. Operation proved stable and free of fluctuations, with no gas or shorts.

Its low noise and microphonics allow for use even in the most sensitive audio stages. It is particularly recommended for hi-fi preamplifiers, headphone amplifiers, driver stages, and guitar amplifiers. The sections show good consistency and are fully suitable for all applications where absolute symmetry between the two triodes is not required.

In terms of sound, this JAN Sylvania offers the personality for which the early 6SN7W tubes are particularly appreciated: open, dynamic, and authoritative sound, with a natural and well-focused midrange, solid and articulated low frequencies, and extended highs without harshness. The quick response and remarkable separation contribute to an energetic, detailed, and musically engaging reproduction.

A high-interest offering for those who desire an authentic U.S. Navy Sylvania JAN 6SN7W, in the sought-after Tall Bottle construction with Black T‑Plates and Chrome Top: a specimen that is aesthetically very well preserved, accurately tested, and ready to enhance quality audio equipment.

Additional Tests:

  • Microphonics and noise: Low. Tested and compliant for use in hi-fi equipment and guitar amplifiers, even in the most sensitive audio stages.
  • Balance: Good. The sections present a consistent balance, fully compatible with use in hi-fi and musical amplifiers, in all applications where absolute symmetry between sections is not required.
  • Emission: Excellent – Very strong and stable emission, without fluctuations.
  • Shorts / Gas: absent

Conditions

  • Condition: Vintage Tube - Tested and perfectly functional. Supplied in our custom box for optimal protection.
  • Functionality: Fully operational
  • Cosmetic condition: Excellent – Markings well preserved, minimal signs of age. See photos for details.
  • Manufacturing code: Code indecipherable. Production indicatively attributable to the 1950s based on construction features.

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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.

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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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