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RCA

12AU7A / ECC82 NOS RCA Matched Pair Tubes - Long Gray Plates Halo Getter USA

12AU7A / ECC82 NOS RCA Matched Pair Tubes - Long Gray Plates Halo Getter USA

22.300 HUF
22.300 HUF
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12AU7A / ECC82 NOS RCA Matched Pair Long Gray Plates Halo Getter Made in USA

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

Description:

This matched pair of 12AU7A / ECC82 RCA NOS, Made in USA production, represents a particularly interesting selection for enthusiasts of the best vintage American tubes.

Although branded RCA, the internal construction is clearly traceable to SYLVANIA USA production, recognizable by the typical structure with Long Gray Plates and Halo Getter, a configuration much appreciated for reliability, quiet operation, and balanced musicality.

The tubes are in NOS (New Old Stock) condition and have been carefully selected and matched in our laboratory using an AMPLITREX AT-1000 Tube Tester, both testing VERY STRONG, with excellent electrical consistency and good balance between sections.

The Low Noise & Microphonics selection makes them particularly interesting for quality hi-fi applications, including preamplifiers, line stages, and sensitive circuits.

Aesthetically, the pair is in very good condition, with legible lettering and normal signs of age consistent with long-term storage. See photos for details.

Sonic Characteristics

The best Sylvania Long Gray Plates productions are appreciated for their tonal balance, natural midrange, and ability to deliver an engaging yet controlled musical reproduction.

Bass

The low end is well-articulated and controlled, with a pleasant sense of solidity and presence without excess.

Midrange

The midrange is one of the strengths of this production. Vocals are natural, well-focused, and rich in harmonic nuances, while acoustic instruments maintain remarkable timbral credibility.

Treble

The highs are open, clean, and well-extended, with a refined presentation that avoids any sense of aggressiveness.

Dynamics

Dynamic response is prompt and natural, with a good ability to follow musical variations and preserve the sense of rhythm.

Soundstage

The soundstage is wide and stable, with correct instrument placement and a pleasant sense of depth.

🎧 Use in Hi-Fi Amplifiers

This pair is particularly suitable for:

  • Tube preamplifiers
  • Line stages
  • Driver stages
  • Integrated amplifiers
  • DACs and tube buffers
  • Restoration of vintage hi-fi electronics

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

🎸 Use in Musical Applications

In amplifiers for musical instruments and compatible professional equipment, these 12AU7A can offer:

  • Excellent operational stability
  • Natural harmonic response
  • Low noise
  • Excellent signal intelligibility

Features that make them interesting for both studio and live applications.

🎯 Note for Audiophiles and Technicians

This pair combines several elements particularly appreciated by enthusiasts:

  • Golden age American production
  • RCA brand
  • Sylvania USA construction
  • Long Gray Plates
  • Halo Getter
  • Matched Pair
  • Low Noise & Microphonics
  • VERY STRONG performance

A high-quality selection that offers the charm of the best vintage American production, with solid performance and great versatility of use.

Test Results:

Tube tested on AMPLITREX AT-1000 Tube Tester:
Test Conditions: Va = 250V, Vg = -8.5V
Average 100%: Gm = 2200 ; Ia = 10.5 mA
Test Result: VERY STRONG

Tube #1:

Section 1: Gm = 2100 ; Ia = 9.0 mA
Section 2: Gm = 2000 ; Ia = 9.6 mA

Tube #5:

Section 1: Gm = 2100 ; Ia = 9.0 mA
Section 2: Gm = 2100 ; Ia = 8.8 mA

Additional Tests Performed:

  • Microphonics: Low. Tested and suitable for hi-fi use, including phono stages and guitar amplifiers. Also suitable for V1.
  • Balance: The sections are consistent and well-aligned, making the tube suitable for use as a phase inverter in hi-fi and instrumental applications.
  • Emission Quality: Excellent – Very strong and stable emission, without fluctuations.
  • Shorts 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 markings with slight signs of age. See photos for details.
  • Manufacturing Code: undecipherable, identifiable by construction characteristics. 1960s

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.

  • 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.