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RCA

12AX7 / ECC83 RCA Short Gray Plates Halo Getter Matched Pair Tubes Made in USA '60s

12AX7 / ECC83 RCA Short Gray Plates Halo Getter Matched Pair Tubes Made in USA '60s

₩142,000 KRW
₩142,000 KRW
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12AX7 / ECC83 RCA Short Gray Plates Halo Getter Matched Pair Tubes Made in USA '60s

AMPLITREX Tested - Low Noise & Microphonics - Vintage American RCA Production

Description:

This matched pair of 12AX7 / ECC83 RCA tubes, produced in the USA in the 1960s, represents one of the most balanced and versatile interpretations of the famous American ECC83.

The construction with Short Gray Plates and Halo Getter identifies RCA production at the company's full industrial maturity, characterized by reliability, operational stability, and excellent constructive consistency.

RCA short gray plates have been appreciated for decades for their natural musical character, their ability to adapt to numerous applications, and a balanced sound presentation that makes them particularly interesting in both hi-fi and musical contexts.

This pair has been carefully selected and verified using AMPLITREX AT-1000, showing STRONG performance on both tubes and overall consistent performance for use as a Matched Pair.

The Low Noise & Microphonics selection also ensures contained noise and stable behavior even in the most sensitive circuit positions.

Sonic Characteristics

The 1960s RCA Short Gray Plates are known for a balanced, pleasant, and versatile musical reproduction.

Bass

The bass range is well-controlled and correctly articulated, with good presence and an always natural response.

Mids

The mids are open and credible, with a pleasant rendering of voices and acoustic instruments. The character remains musical and well-balanced.

Highs

The highs are clean and well-extended, with a good ability to reproduce detail without being aggressive or fatiguing.

Dynamics

The dynamic response is prompt and natural, with a good ability to follow variations in the musical program while maintaining balance and consistency.

Soundstage

The soundstage is ordered and stable, with correct instrument separation and a pleasant sense of openness.

🎧 Use in Hi-Fi Stereo Amplifiers

This matched pair is particularly suitable for:

  • Tube preamplifiers
  • Integrated hi-fi amplifiers
  • Line stages
  • Phono stages
  • Driver stages
  • Restorations of vintage American electronics

The Low Noise & Microphonics selection also makes it suitable for the most sensitive circuit positions.

🎸 Use in Musical Amplifiers

The RCA ECC83s from the 1960s are also highly appreciated in musical contexts due to their versatility and musicality.

They can offer:

  • Good harmonic response
  • Natural and well-defined mids
  • Contained noise
  • Balanced dynamic response

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

🎯 Note for Audiophiles and Technicians

Authentic RCA Made in USA tubes are always a popular choice among enthusiasts of American tubes.

The combination of:

  • Original RCA USA production
  • Short Gray Plates
  • Halo Getter
  • Matched Pair
  • Low Noise & Microphonics
  • STRONG performance

makes this pair a very interesting solution for those who want a balanced, musical, and reliable American ECC83.

A selected pair that retains all the charm of RCA's 1960s tradition, offered according to Vacuum Tubes Treasures quality standards.

Test Results:

Tube tested on AMPLITREX AT-1000 Tube Tester:

  • Test Conditions: Va = 250V ; Vg = -2V
  • Average 100%: Gm = 1600 ; Ia = 1.2 mA
  • Test Result: STRONG

Tube 1:

  • Section 1: Gm = 1400 ; Ia = 0.8 mA
  • Section 2: Gm = 1400 ; Ia = 1.1 mA

Tube 2:

  • Section 1: Gm = 1300 ; Ia = 0.7 mA
  • Section 2: Gm = 1400 ; Ia = 0.8 mA
Additional Tests Performed:
  • Microphonics: Low. Tested and suitable for use in hi-fi and guitar amplifiers, including in V1.
  • Balance: Good. The sections exhibit consistent balance, fully compatible with use in hi-fi and musical amplifiers, in all applications where absolute symmetry between sections is not required.
  • Emission Quality: Good Emission – Good and regular emission, suitable for any application.
  • Shorts and GAS: Absent.

Conditions:

  • Conditions: Vintage Tubes - Tested and fully functional. Supplied in our custom box for optimal protection.  
  • Functionality: Perfectly operational.
  • Aesthetic Condition: Adequate – Faded or barely legible markings, overall aesthetics with clear signs of age. See photos for details.
  • Manufacturing Code: not decipherable – RCA USA production, identifiable by 1960s constructive features

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
📧 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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