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TELEFUNKEN

EZ80 / 6V4 TELEFUNKEN Ulm Diamond Bottom Halo Getter Rectifier Tube Made in Germany

EZ80 / 6V4 TELEFUNKEN Ulm Diamond Bottom Halo Getter Rectifier Tube Made in Germany

€59,90 EUR
€59,90 EUR
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EZ80 / 6V4 TELEFUNKEN Ulm Plant Diamond Bottom Halo Getter Rectifier Tube Made in Germany – FUNKE Tested

Made in Germany – Ulm Plant – Diamond Bottom – Halo Getter – Tested VERY STRONG

Description:

This EZ80 / 6V4 Telefunken is a high-quality vintage rectifier tube, produced in Germany at the historic Telefunken Ulm plant, recognizable by its code and the characteristic diamond bottom etched on the glass between the pins.

The EZ80 / 6V4 is a 9-pin miniature rectifier widely used in radios, tuners, preamplifiers, vintage hi-fi amplifiers, and compatible circuits. In this Telefunken version, the neat internal construction, the halo getter, and German manufacturing quality contribute to making it a very interesting choice for accurate restorations and vintage audio applications.

The visible code U7202602 can be interpreted as Ulm production, June 27, likely 1962, an attribution cautiously made based on the tube type, internal construction, and the production context.

The tube is in good overall aesthetic condition, with the Telefunken lettering still clearly visible and legible. Normal signs of age compatible with an original vintage tube are present. The glass is intact, the getter is well-preserved, and the diamond bottom represents an important element of Telefunken authenticity.

Sonic Characteristics

The rectifier does not intervene in the audio signal like a preamplification tube, but plays a fundamental role in the quality of the device's power supply, influencing its sound.

Bass

In compatible and correctly designed circuits, a stable rectifier like this can contribute to a sense of orderly and controlled bass, supporting the power supply without introducing noticeable instability.

Midrange

Power supply stability helps preserve a natural and consistent midrange, with a fluid and well-balanced presentation, particularly appreciated in well-maintained vintage radios and hi-fi equipment.

Treble

The overall response remains clean and composed, with a sense of order and finesse. The EZ80 Telefunken is among the most interesting rectifiers when one wishes to maintain the original character of the device without introducing unwanted alterations.

Dynamics

The very good and well-balanced electrical behavior contributes to a stable dynamic response. In compatible devices, this can translate into a more orderly reproduction, with good hold in the most articulated musical passages.

Soundstage

In vintage hi-fi applications, stable rectification can promote a more coherent and focused soundstage, with an orderly and well-controlled presentation, always depending on the device's design and the general condition of the circuit.

🎧 Use in Hi-Fi Amplifiers

This EZ80 / 6V4 Telefunken Ulm Plant is suitable for compatible devices that require an EZ80 / 6V4 rectifier, including:

  • vintage radios
  • tuners
  • preamplifiers
  • vintage hi-fi amplifiers
  • audio circuits compatible with EZ80 / 6V4

It is a particularly suitable choice when a high-quality level is desired, with an original German tube, tested and verified.

🎸 Use in Musical Applications

In instrument equipment compatible with EZ80 / 6V4, this Telefunken can offer a stable and orderly response, useful when seeking reliability, control, and consistency in the power supply.

As always, usage must respect the electrical specifications of the device.

🎯 Note for Audiophiles and Technicians

This tube represents an interesting selection for those looking for a true Telefunken Made in Germany, with an authentic diamond bottom, Ulm Plant production, halo getter, and very solid test values.

The test on Funke W19 yielded a very good and well-balanced result, allowing it to be offered as Tested VERY STRONG.

This is not a generic EZ80 / 6V4, but an original Telefunken rectifier, verified and selected for those who desire construction quality, authenticity, and operational reliability in compatible circuits.

Test Results:

  • Tube tested on Funke W19 Tube Tester:
  • Test Conditions: Va = 60V, Vf = 6.3V
  • Average 100%: Ia = 53 mA
  • Test Result: VERY STRONG

Tube:

  • Section 1: Ia = 49 mA
  • Section 2: Ia = 49 mA

Conditions:

  • Condition: Vintage Tubes - Tested and perfectly functional. Supplied in our custom box for optimal protection.
  • Functionality: Perfectly operational.
  • Cosmetic Condition: Excellent – Lettering excellently preserved, minimal signs of age. See photos for details.
  • Manufacturing Code: U7202602 → Ulm plant production, June 27, likely 1962 based on the tube type, internal construction, and Telefunken's production context at the time.

Discover why our tubes are different →

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.

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