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AMPEREX

5AR4 ( GZ34 ) – Amperex Philips Sittard f31 X9A – DD Getter – Holland '50s – 100% Strong Tested – Rectifier Tube

5AR4 ( GZ34 ) – Amperex Philips Sittard f31 X9A – DD Getter – Holland '50s – 100% Strong Tested – Rectifier Tube

Regular price $494.00 CAD
Regular price Sale price $494.00 CAD
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5AR4 ( GZ34 ) NOS NIB AMPEREX by Philips Sittard f31 X9A DD Getter, Tested Tube Rectifier MADE IN HOLLAND '50s

Sound Description:

The 5AR4 / GZ34 AMPEREX , made by Philips Sittard (Holland) in the 1950s, with code f31 X9A and double D-getter , is one of the rarest and most sought-after versions of this rectifier. Appreciated by enthusiasts for its solid construction , extraordinary electrical stability and natural and musical sound contribution , it represents today one of the finest choices for powering high-end hi-fi and instrumental tube systems. This tube is NOS , electrically tested , and comes from a selection of authentic Made in Holland examples.

Bass : compact and well articulated, with a solid and deep structure that supports the system without swelling. The low range is taut, precise, and always under control, with an excellent ability to support high dynamic loads without loss of definition.

Mids : transparent and linear, with a neutral and coherent timbre rendering. Voices and acoustic instruments are reproduced realistically, without emphasis, with a balance that enhances the naturalness of the sound message.

Highs : Airy, refined and always musical. The high-end extension develops with delicacy and precision, helping to maintain a bright but never fatiguing soundstage, even in highly resolving amplifiers.

Dynamics : smooth and responsive, with a prompt response to current demands and a remarkable ability to handle the fastest transients without stiffening. Voltage delivery is progressive, well damped, with a beneficial effect on the overall coherence of the system.

Soundstage : tidy, stable and coherent. Even though it is a rectifier tube, the influence on the sound is clearly perceived in the cleanliness of the black background , in the definition of the microdynamics and in the overall clarity of the musical scene.

The 5AR4 AMPEREX Sittard f31 Double D-Getter is ideal for integrated amplifiers, tube preamplifiers, single-ended or push-pull power amplifiers that use this type of rectifier. It is particularly suitable for systems that require maximum reliability , voltage stability over time and absence of coloration , such as in boutique guitar amplifiers (e.g. Vox AC30 , Matchless DC-30 ) where the quality of the power supply section is crucial to the sonic response of the entire circuit.

🎯 Note for audiophiles :
Very rare version with double D getter , sought after by collectors and enthusiasts for its combination of top-level electrical and musical performance. Ideal for those who want the best in terms of clarity, articulation and neutrality , without introducing any unwanted coloration. A fundamental component for reference hi-fi systems or for vintage amplifiers restored with original components.

🎸 Use in Guitar and Bass Amplifiers

The 5AR4 AMPEREX Sittard with Double D-Getter , thanks to its smooth and stable tension delivery , is one of the most sought-after rectifiers also in the instrumental field. Its progressive, never aggressive response favors a natural compression , much appreciated by musicians who want a warm, round and dynamic sound.

It is particularly suited to circuits that benefit from well-damped tube rectification, such as those found in the Vox AC30 , Marshall JTM45 , Hiwatt DR Series , Matchless DC-30 , or in boutique amps built with NOS parts. In these contexts, the Sittard AMPEREX offers a controlled attack , musical sustain , and a smooth transition to breakup , contributing to a natural, consistent, and always musical touch response.


Test Results:

Tubes tested on FUNKE W19 Tube tester:

  • Test Conditions: Va = 60V, Vf = 5V
  • Good from: Ia = 55 mA
  • Average 100%: Ia = 100 mA
  • Test Result: VERY STRONG

Plate current:

  • Section 1: Ia = 100 mA
  • Section 2: Ia = 102 mA

Additional Tests

  • Microphony: Standard. Tested and approved for use in hi-fi and guitar amplifiers.
  • Output Quality: Excellent – ​​Very strong and stable output, no fluctuations.
  • Short circuits and GAS: Absent.

Conditions:

  • Conditions: NOS - NIB - New Old Stock, New In Box - Tested and working - Supplied in original box (see photo for box condition).
  • Functionality: Fully functional.
  • Aesthetic conditions: Sufficient – ​​Writings almost completely disappeared. See photos for details.
  • Manufacturing Code: f31 X9A - Manufactured in the Sittard plant - in January 1959

Burglar-Proof Security Seal Policy:

Each product is sealed to ensure quality and integrity.
The right of withdrawal is subject to the tamper-proof seal being kept intact, as required by the Consumer Code.


Eco-friendly packaging:

The valve will be shipped with protected packaging to ensure safety during transportation.
We use recycled and recyclable paper for packaging, and brown tape ECO-KRAFT , eco-friendly and solvent-free.


Important Notes:

This tube, produced to the standards of the time, is designed to work in equipment compatible with vintage tubes.
It is recommended to follow the safety guidelines to avoid malfunctions or damage.


Security Guarantee:

Although not tested to modern GPSR regulations, this valve has been designed to operate safely under the conditions for which it was manufactured.
We recommend using it with equipment that supports vintage tubes, to avoid the risk of malfunction or damage.


Safety information:

  • Attention: Keep out of reach of children.
  • To be used under adult supervision.
  • Use this product only with equipment 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.