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RAYTHEON

12AX7 / ECC83 NOS RAYTHEON Long Black Plates Tested Tube - Balanced - Made in USA '61

12AX7 / ECC83 NOS RAYTHEON Long Black Plates Tested Tube - Balanced - Made in USA '61

918,00 SEK
918,00 SEK
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12AX7 / ECC83 NOS RAYTHEON Long Black Plates Halo Getter Tested Tube Made in USA '61

AMPLITREX Tested – VERY STRONG – Low Noise & Microphonics – Balanced – Vintage American RAYTHEON Production

Description:

This 12AX7 / ECC83 Raytheon NOS, produced in the United States in 1961, represents one of the most appreciated American productions from the golden age of signal tubes.

The construction with Long Black Plates and Halo Getter identifies a classic Raytheon configuration from the early 1960s, highly sought after by enthusiasts for its build quality, reliability, and distinctive sonic character.

Raytheon was one of the most important companies in American electronics history, and its ECC83 long black plates are still considered among the most interesting vintage USA productions for quality audio applications.

This specimen has been carefully verified using an AMPLITREX AT-1000 Tube Tester, resulting VERY STRONG, with electrical performance very close to the nominal reference values and excellent balance between sections.

The Low Noise & Microphonics selection makes it particularly suitable for sensitive circuit positions, including input stages, phono stages, and V1.

Sonic Characteristics

Raytheon Long Black Plates are appreciated for a rich, fluid, and musical sonic presentation, with a typically American personality characterized by body, naturalness, and excellent intelligibility.

Bass

The bass range is full and well-structured, with good presence and a pleasant sense of solidity that supports the reproduction without weighing it down.

Mids

The mids represent one of the strengths of this production. Vocals are textured, credible, and engaging, while acoustic instruments and harmonics maintain a rich and natural texture.

Highs

The highs are open, refined, and well integrated into the musical message. Detail is present without being aggressive or artificial.

Dynamics

Dynamic response is fluid and well-controlled, with excellent ability to follow variations in intensity and musical nuances.

Soundstage

The soundstage appears wide and stable, with good instrument focus and an orderly presentation of the acoustic space.

🎧 Use in Hi-Fi Amplifiers

This Raytheon ECC83 is particularly suitable for:

  • tube preamplifiers
  • line stages
  • phono stages
  • integrated amplifiers
  • compatible driver stages
  • restoration of vintage American hi-fi electronics

The Low Noise & Microphonics selection makes it particularly interesting even in the most sensitive positions of the circuit.

🎸 Use in Musical Applications

In the musical instrument amplifier sector, Raytheon Long Black Plates are appreciated for:

  • natural harmonic response
  • rich and well-present mids
  • good dynamics
  • contained noise
  • balanced musicality

Characteristics that make them interesting for both vintage amplifiers and modern boutique designs.

🎯 Note for audiophiles and technicians

Authentic Raytheon Long Black Plates Made in USA represent one of the most fascinating productions of the American ECC83 tradition.

The combination of:

  • original USA Raytheon production
  • 1961 year
  • Long Black Plates
  • Halo Getter
  • Low Noise & Microphonics
  • perfectly balanced sections
  • VERY STRONG performance

makes this specimen particularly interesting for those looking for a quality vintage American ECC83, capable of combining reliability, musicality, and historical charm.

A selected tube that expresses the authentic character of the best Raytheon production of the early 60s, in true Vacuum Tubes Treasures style.

Test Results

Tested on AMPLITREX AT-1000 Tube Tester

Voltage Test: Va = 250V, Vg = -2V
Average 100%: Gm = 1600 ; Ia = 1.2 mA
TEST RESULT: VERY STRONG

Tube :

  • Section 1: Gm = 1600 ; Ia = 1.1 mA
  • Section 2: Gm = 1600 ; Ia = 1.1 mA

Additional Tests Performed:
  • Microphonics: Low. Tested and suitable for hi-fi use, including phono stages and guitar amplifiers. Also suitable for V1.
  • Balance: Very good. The sections are consistent and well-aligned, making the tube also suitable for use as a phase inverter in hi-fi and instrumental applications.
  • Emission Quality: Excellent – Very strong and stable emission, without fluctuations.
  • Short Circuits and GAS: Absent.

Conditions:

  • Condition: NOS - New Old Stock - Tested and working - Supplied in our custom box for optimal protection. 
  • Functionality: Perfectly operational.
  • Aesthetic Condition: Very Good – Legible lettering with slight signs of age, no obvious defects. See photos for details.
  • Manufacturing Code: 280 61-21 → 280 → Raytheon Manufacturing Company, Waltham 54, Mass. ; 61-21 → RMA/EIA Open Date Code → manufactured in the 21st week of 1961

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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📧 info@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.

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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.