1 16

SYLVANIA

5751 12AX7 ECC83 NOS Sylvania 💎 Gold Brand – Gold Pin Disc Getter Amplitrex Tested Tube USA

5751 12AX7 ECC83 NOS Sylvania 💎 Gold Brand – Gold Pin Disc Getter Amplitrex Tested Tube USA

ÂĽ735.00 CNY
ÂĽ735.00 CNY
Sale Sold out
Shipping calculated at checkout.
🖨️ Print as PDF

5751 ( 12AX7 ECC83 ) NOS SYLVANIA 💎 Gold Brand Gold Pin Disc Getter AMPLITREX Tested Tube MADE IN USA

Description:

The SYLVANIA 5751 Gold Brand is one of the most popular versions of this well-known low-gain double triode (about 70% of that of a 12AX7), selected in the Gold Brand series with gold-plated feet for professional, military, and broadcast applications. Equipped with a disc getter and carefully constructed internal structure, it offers a very refined, balanced, and quiet sound, ideal for both audiophile listening and for tonal control in critical environments.

The 5751's character is transparent and controlled , with a smoother response than a classic 12AX7, but without losing detail or musicality. It's often chosen to "calm down" overly aggressive preamp sections or to improve resolution in high-end tube amplifiers.

Bass : Dry and controlled, with good articulation. It lacks excessive emphasis, but ensures precision even on complex passages.

Mids : rich in harmonic content, but never intrusive. Voices sound natural, with good body and excellent intelligibility.

Highs : Delicate and clean, without harshness. They offer an airy but well-regulated extension, suitable even for prolonged listening.

Dynamics : Smoother and more progressive than a standard 12AX7, but very coherent. It delivers detail naturally, without artificial compression.

Soundstage : Wide and very focused, with depth and a well-defined presentation even on high-resolution systems.

A perfect tube for hi-fi preamplifiers, phono stages, tube DACs, or even as a strategic replacement for 12AX7 in systems or instruments where greater balance and definition is needed.

🎸 Use in Guitar and Bass Amplifiers

The SYLVANIA 5751 Gold Brand is also a popular choice in the guitar world, especially for those who want to slightly reduce the gain of a preamp stage for greater headroom, clarity, and articulation. Its sturdy construction and gold-plated feet make it extremely stable and quiet, perfect for live performance, recording, and high-sensitivity environments.

It is particularly suitable for musicians who want to make a very aggressive tube amplifier more manageable , maintaining tonal quality and improving dynamic control. In the clean channels it offers more space before saturation , while in the overdrive channels it allows you to maintain definition and reduce unwanted compression .

🔊 Ideal for musicians looking for :

  • Wider, brighter and less compressed cleans
  • Greater gain control in saturated channels
  • Smoother and more progressive response to touch
  • Silence and reliability even with complex effects or in the studio

🎸 Recommended amplifiers :

  • Fender Blues Junior / Hot Rod Deluxe – For improved gain control and more open cleans
  • Marshall DSL / JCM800 – Great for smoothing out the early stages and getting more control
  • Mesa/Boogie Dual Rectifier (Clean Channel) – More headroom and detail in the low end
  • Boutique amps (e.g. Two Rock, Matchless) – For those who want more nuance and fine dynamics

🎯 Note for musicians :
This tube is perfect for intelligently shaping your sound , reducing the harshness of dynamic peaks and delivering a more controlled and musical harmonic range , especially in the early pre-amp stages.

Test Results:

Valve tested on AMPLITREX AT-1000 Tube Tester:

  • Test Conditions: Va = 250V ; Vg = -3V
  • Average 100%: Gm = 1200 ; Ia = 1.0 mA
  • Test Result: VERY STRONG

Valve:

  • Section 1: Gm = 1000 ; Ia = 0.8 mA
  • Section 2: Gm = 1300 ; Ia = 1.1 mA
Additional Tests Performed:
  • Microphonics: Low. 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:

  • Condition: NOS - New Old Stock - Tested and working - Supplied in our custom box for optimal protection.
  • Functionality: Fully functional.
  • Aesthetic condition: Very good – Legible writing with minor signs of aging, no obvious defects. See photos for details.
  • Manufacturing Code: Unreadable – Made by SYLVANIA USA, identifiable by its construction features. 1960s

Find out why our valves 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

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.