1 18

PHILIPS

ECC88 / 6DJ8 Heerlen Δ9E (Philips Production) – D Getter – Matched Pair – Made in Holland '50s

ECC88 / 6DJ8 Heerlen Δ9E (Philips Production) – D Getter – Matched Pair – Made in Holland '50s

€89,90 EUR
€129,90 EUR €89,90 EUR
Sale Sold out
Taxes included. Shipping calculated at checkout.

ECC88 / 6DJ8 Heerlen Δ9E (Philips Production) – D Getter – Matched Pair – Made in Holland '50s

Description:

This matched pair of ECC88/6DJ8 produced by Philips Heerlen (Δ9E) belongs to the first production phase of the Dutch factory, recognizable by the three-symbol code and the internal structure with D-shaped getters , typical of the older versions.

The original silkscreen is no longer present, but the codes engraved in the glass consistently confirm Heerlen production.

The valves are used, in sound structural condition, with normal patina consistent with age.

Tested in our laboratory on Amplitrex AT-1000 , they are classified as: GOOD

The matching between the two units is functional and consistent for non-critical uses.

Sound Character

Bass: Linear and controlled, without emphasis. Correct and natural reproduction.

Mids: Open and transparent, with good intelligibility of voices and typical Philips Heerlen timbre setting.

Highs: Sweet and balanced. The top end is not aggressive and maintains a fine texture.

Dynamics: Progressive and smooth. Ideal for those seeking a less aggressive and more organic ride.

Soundstage: Coherent and uncluttered, with proper instrument separation.

🎧 Use in Hi-Fi Amplifiers

Suitable for preamplifiers, line stages, and vintage equipment where a balanced, not overly bright, output is desired. Not intended for high-end selections or applications requiring high output.

🎸 Use in Music Applications

Interesting in instrument circuits and contexts where a softer and more progressive response is appreciated, with natural compression.

🎯 Note for audiophiles and technicians

  • Authentic Philips Heerlen production (Δ9E)
  • D Getter first phase
  • Vintage 50s
  • Functional Matched Pair

A pair that offers the charm of older Heerlen production in an accessible configuration, designed for those who appreciate the historical and sonic character beyond pure numerical performance, in true Vacuum Tubes Treasures style.

Test Results

Tested on AMPLITREX AT-1000 Tube Tester

Voltage Test: Va = 90V ; Vg = -1.2V
Average 100%: Gm = 12.5 ; Ia = 15.0 mA
TEST RESULT: GOOD

Valve 1:

  • Section 1: Gm = 8.68 ; Ia = 10.4 mA
  • Section 2: Gm = 8.5 ; Ia = 9.2 mA

Valve 2:

  • Section 1: Gm = 8.68 ; Ia = 9.0 mA
  • Section 2: Gm = 9.47 ; Ia = 9.4 mA

Additional Tests Performed:
  • Microphonics: Low. Tested and approved for use in hi-fi, phono stages, and guitar amplifiers, including V1.
  • Output Quality: Excellent – Very strong and stable output, no fluctuations.
  • Short circuits and GAS: Absent.

Conditions:

  • Condition: Vintage tubes - Tested and in perfect working order. Shipped in our custom box for optimal protection.
  • Functionality: Fully functional.
  • Cosmetic condition: Fair – Writing completely faded. See photos for details.
  • Manufacturing Code: Δ9E → Δ → Heerlen (Holland), 9 (three digits) → 1959 - E → May

Find out why our valves 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

View full details

  • 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.