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GE

12AX7 / ECC83 GE Long Gray Plates Halo Getter - Balanced - Low Noise & Mic - Made in USA

12AX7 / ECC83 GE Long Gray Plates Halo Getter - Balanced - Low Noise & Mic - Made in USA

HK$553.00 HKD
HK$553.00 HKD
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12AX7 / ECC83 GE Long Gray Plates Halo Getter Made in USA '65

AMPLITREX Tested – Balanced Sections – Low Noise & Microphonics

Description:

This 12AX7 / ECC83 General Electric, manufactured in the United States in March 1965, is a classic American signal tube from one of General Electric's most acclaimed productions.

The internal construction is typical of GE at the time, featuring Long Gray Plates and a Halo Getter, a configuration now highly sought after for its reliability, operational stability, and balanced musicality.

The tube has been thoroughly tested in our laboratory using the AMPLITREX AT-1000 Tube Tester, receiving a STRONG rating. It also exhibited Low Noise & Microphonics, a particularly desirable characteristic for hi-fi applications and sensitive circuits.

Electrically, it shows very consistent performance and perfectly balanced sections, qualities that enhance its versatility in use.

Sonic Characteristics

GE Long Gray Plates from the 1960s are valued for a balanced, natural, and well-organized sound presentation, with an open and musical timbre that easily adapts to many system types.

Bass

Well-extended and controlled. The low range is stable and articulate, with a good sense of order and depth.

Mids

Clear, natural, and well-focused. Vocals maintain presence and intelligibility, while acoustic instruments are reproduced with balance and timbral accuracy.

Highs

Open and airy. The high end is clean and well-extended, contributing to a detailed yet always pleasing sound presentation.

Dynamics

Responsive and linear. Dynamic variations are reproduced naturally and with good consistency across the entire audio spectrum.

Soundstage

The soundstage is stable and well-organized, with correct instrument separation and good image focus.

🎧 Use in Hi-Fi Amplifiers

This 12AX7 / ECC83 GE is particularly suitable for:

  • tube preamplifiers
  • phono stages
  • driver stages
  • integrated amplifiers
  • compatible vintage and modern hi-fi equipment

The combination of Low Noise, contained microphonics, and perfectly balanced sections makes it suitable for sensitive circuit positions, including applications such as phase inverters.

🎸 Use in Musical Applications

This GE Long Gray Plates is also popular in musical instrument amplifiers thanks to its:

  • balanced dynamic response
  • good signal definition
  • natural musical character
  • stable and predictable behavior

These characteristics make it interesting for both studio use and compatible vintage and boutique amplifiers.

🎯 Note for Audiophiles

  • General Electric – Made in USA
  • Production: March 1965
  • Long Gray Plates – Halo Getter
  • AMPLITREX Tested
  • STRONG
  • Low Noise & Microphonics
  • Perfectly Balanced Sections

This 12AX7 GE represents a solid American selection from the 1960s, capable of offering balance, reliability, and musicality in a classic and highly appreciated configuration.

An authentic vintage tube, selected according to Vacuum Tubes Treasures standards, ideal for those seeking a well-preserved, quiet, and perfectly usable American ECC83 in numerous hi-fi and musical applications.

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: STRONG

Tube:

  • Section 1: Gm = 1400 ; Ia = 0.9 mA
  • Section 2: Gm = 1400 ; Ia = 0.9 mA

Additional Tests Performed:
  • Microphonics: Low Noise & Microphonics – Tested and suitable for use in hi-fi systems and guitar amplifiers.
  • Balance: Sections are consistent and perfectly aligned, making the tube suitable for use as a phase inverter in hi-fi and instrument applications.
  • Emission Quality: Strong – Strong and consistent emission, suitable for any application.
  • Shorts and GAS: Absent.

Condition:

  • Condition: Vintage Tubes - Tested and fully functional. Supplied in our custom box for optimal protection. 
  • Functionality: Perfectly operational.
  • Cosmetic Condition: Good – Markings partially faded, but still legible. Tube body in good condition. See photos for details.

Manufacturing Code:

  • FU 188 → two-letter code → March 1965 production - 188 → General Electric Company, Syracuse 1, N. Y.

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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.

Vacuum Tubes Treasures
www.vtt.store | www.vacuumtubestreasures.com
📧 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.

  • 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.