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TELEFUNKEN

12AX7 ECC83 NOS TELEFUNKEN NOS Ribbed Plates Diamond Bottom Matched Pair Tubes Made in Western Germany

12AX7 ECC83 NOS TELEFUNKEN NOS Ribbed Plates Diamond Bottom Matched Pair Tubes Made in Western Germany

Regular price €249,90 EUR
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12AX7 (ECC83) TELEFUNKEN NOS Ribbed Plates Diamond Bottom – Matched Pair Tubes – Made in Western Germany

Sound Description:
The 12AX7 / ECC83 TELEFUNKEN, in this rare NOS version featuring ribbed plates, diamond <> bottom, and matched pair configuration, represents one of the most legendary vacuum tubes of the postwar European production.
Manufactured at the Ulm facility (West Germany), it is universally praised for its airy musicality, extreme tonal transparency, and its ability to maintain control and coherence even under complex operating conditions.

Bass: Dry, fast, and perfectly controlled. The low end is not emphasized but remains precise, dynamic, and free from muddiness—ideal for systems focused on instrumental separation.

Mids: Clear, open, and detailed. Vocals appear refined, believable, and well-centered, while acoustic instruments emerge with natural presence. This midrange has an analytical yet musical character—never sterile, always articulate.

Highs: Brilliant, refined, and never aggressive. The top end is among the most praised in European tube production: it offers airiness, detail, and microdynamics without listener fatigue, even at higher volumes.

Dynamics: Fast and articulate. The tube accurately tracks every intensity variation, delivering proportionate and stable handling during both subtle passages and sudden peaks.

Soundstage: Wide, airy, and three-dimensional. The stereo image is vivid, with excellent separation between layers and a timbral coherence that fosters immersive, analytical listening.

The 12AX7 TELEFUNKEN Ribbed Plates – Diamond Bottom – Matched Pair – NOS is one of the most reliable and refined choices for high-resolution audio, where transparency, micro-detail, and coherence are essential.


🎧 Use in Headphone Amplifiers and Hi-Fi Driver Stages
Ideal as a gain stage in high-end preamps, tube DACs, or reference OTLs, this matched pair guarantees low noise, tonal balance, and exceptional detail reconstruction. Perfect in combination with reference headphones like Audeze LCD-5, Focal Utopia, or Sennheiser HD800S.

🎸 Use in Guitar and Bass Amplifiers
In the musical field, the Telefunken ECC83 Ribbed Plates is highly sought after for its defined, dynamic tone free from harshness. It offers excellent control even in overdriven conditions, making it perfect for the preamp stages of boutique heads or vintage amps like the Marshall JTM45, Fender Deluxe Reverb, or Hiwatt DR103.

🎯 Note for Audiophiles and Technicians
One of the most neutral, stable, and long-lasting tubes ever made. Perfect for those seeking a crystal-clear sonic presentation, with controlled harmonic behavior and a refined, objective tonal signature.


Test Results
Tested on AMPLITREX AT-1000 Tube Tester

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

Tube 1:

  • Section 1: Gm = 1400 ; Ia = 0.8 mA
  • Section 2: Gm = 1600 ; Ia = 1.0 mA

Tube 2:

  • Section 1: Gm = 1400 ; Ia = 0.8 mA
  • Section 2: Gm = 1600 ; Ia = 1.0 mA

Additional Tests Performed:

  • Microphony: Low Noise & Microphonics – Tested and compliant for use in hi-fi systems and guitar amplifiers.
  • Emission Quality: Excellent – Very strong and stable emission, with no fluctuations.
  • Shorts & Gas: None detected.

Condition:

  • Condition: NOS – New Old Stock – Tested and fully functional – Supplied in our custom protective box.
  • Functionality: Fully operational.
  • Cosmetic Condition: Fair – Partially faded or barely legible lettering, with visible signs of age. Please refer to the photos for details.
  • Manufacturing Code: Not present. Year of manufacture inferred from internal structure – Manufactured in Berlin during the 1960s – Features the impressed Telefunken Diamond between the pins.

Tamper-Evident Security Seal Policy:
Each product is sealed to guarantee quality and integrity.
The right of withdrawal is conditional upon the seal remaining intact, in accordance with the Consumer Code.


Eco-Friendly Packaging:
The tube will be shipped with protective packaging to ensure safety during transport.
We use recycled and recyclable paper materials, along with solvent-free ECO-KRAFT brown tape.


Important Notes:
This tube, produced according to the standards of its time, is intended for use in equipment compatible with vintage vacuum tubes.
We recommend following safety guidelines to prevent malfunction or damage.


Safety Notice:
While not tested under modern GPSR regulations, this tube was designed to operate safely under the conditions for which it was manufactured.
We recommend using it only with equipment designed for vintage vacuum tubes to avoid malfunction or damage.

Safety Instructions:

  • Warning: Keep out of reach of children.
  • To be used under adult supervision.
  • Use only with equipment specifically designed for vintage tubes.

Condizioni di vendita e sicurezza

Anti-Tamper Security Seal Policy:
Each product is sealed to guarantee quality and integrity.
The right of withdrawal is subject to the seal remaining intact, as provided for by the Consumer Code.

Eco-Friendly Packaging:
The tube will be shipped with protective packaging to ensure safety during transport.
We use recycled and recyclable paper for packaging, along with brown ECO-KRAFT adhesive tape, eco-friendly and solvent-free.

Important Notes:
This tube, manufactured according to the standards of its era, is designed to operate in equipment compatible with vintage tubes.
It is recommended to follow standard safety guidelines to avoid malfunctions or damage.

Safety Assurance:
Although not tested according to modern GPSR regulations, this tube was designed to operate safely under the conditions for which it was manufactured.
We recommend using it only with equipment that supports vintage tubes, in order to avoid risks of malfunction or damage.
Technical data note:
In some cases, the technical data provided may be based on datasheets from other manufacturers or on equivalent historical specifications, when a specific official datasheet for the production batch of the listed item is not available.
Electrical characteristics may vary slightly depending on the production batch and manufacturing period, as is typical for thermionic components.

Safety Information:
Warning: Keep out of reach of children.
To be used under adult supervision.
Use the product only with equipment designed for vintage tubes.

Shipping & Returns

Shipping & Returns

Shipping Costs

Shipping costs vary depending on the total amount of the items in the cart and are calculated automatically during the checkout process.
All shipments are fully insured. The courier is automatically selected based on destination, weight, and shipment characteristics.

Shipping Times and Delivery

The indicated delivery times are purely indicative.
Any delays, storage issues, or operational changes made by the carrier (for example during peak periods such as holidays) are not attributable to Vacuum Tubes Treasures.

In such cases, we will nevertheless provide the Customer with all necessary support to open claims or assistance requests with the appointed courier.

International Shipping (Non-EU Countries)

For orders shipped to countries outside the European Union, any customs duties, import taxes, or additional charges are the sole responsibility of the recipient.
Vacuum Tubes Treasures has no control over these costs, which may vary from country to country. Customers are therefore advised to contact their local customs authorities prior to placing an order.

Warranty

All products sold by Vacuum Tubes Treasures are covered by the legal warranty of conformity, in accordance with Italian Legislative Decree No. 206/2005 (Consumer Code) and the Italian Civil Code (Articles 1490 et seq.), under the conditions set out below.

Warranty for Vacuum Tubes

Vacuum tubes, being components subject to wear and of vintage or specialized nature, are covered by a specific warranty of 6 (six) months from the date of delivery.
The warranty covers exclusively proven manufacturing or conformity defects that arise during proper use in accordance with technical specifications.

The warranty does not cover:

  • normal wear and tear,
  • subjective sound preferences,
  • use in incompatible equipment,
  • tampering or improper use.

Right of Withdrawal

Purchases made on the Vacuum Tubes Treasures website are governed by Italian regulations on distance contracts (Legislative Decree No. 206/2005).

Consumers have the right to withdraw from the contract within 14 (fourteen) days from the date of receipt of the goods, without providing any reason.

Conditions for Exercising the Right of Withdrawal

The right of withdrawal may be exercised only if:

  • the product has not been used,
  • the product is returned in its original condition,
  • the tamper-evident security seal is intact and not broken.

📌 Returns are not accepted for reasons related to sound preference, tube rolling, or subjective audio evaluation.
As with a music recording, a vacuum tube cannot be returned simply because its sound does not match personal taste.

Effects of Withdrawal

In the event of a valid withdrawal:

  • all payments received, including standard shipping costs, will be refunded,
  • refunds will be issued within 14 days from receipt of the returned goods,
  • the refund may be withheld until the goods have been received and inspected.

Refunds will be made using the same payment method used for the original transaction, unless otherwise agreed.

Return Shipping Costs

Return shipping costs are borne by the Customer, except in cases of:

  • verified defective products,
  • errors attributable to Vacuum Tubes Treasures.

In such cases, return shipping costs will be fully covered by us.

Damaged or Incorrect Items

If the Customer receives a damaged or incorrect item, it must be reported within 5 (five) working days from delivery, by email or telephone, clearly stating the issue.

Uncollected Parcels, Storage, and International Shipments

It is the Customer’s responsibility to monitor the shipment and promptly arrange for collection or customs clearance.
Any costs, delays, or losses resulting from:

  • failure to collect the parcel,
  • prolonged storage,
  • abandonment of the parcel at customs,

do not entitle the Customer to any refund.

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.