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Quick Details

  • Brand Name: K&D
  • Model Number: TUC-811R-G
  • Type: Professional Amplifier
  • Channels: 2 (2.0)
  • Place of Origin: Guangdong, China (Mainland)
  • Product Name: 4pin tube base
  • Weight: 0.04 kg
  • Application: For 2A3, 811A, 300B, 5Z3....
  • MOQ: 100 Pcs
  • Certification: CE/ROHS/ISO9001:2008

Packaging & Delivery

Packaging Details Carton box
Delivery Time 10 days after payment
Product Description

GOLD Ceramic Socket U4A 300B 4Pin Tube Base

For 2A3, 811A, 300B, 5Z3....
Outside diameter:1.375"
Inside diameter: 1.120"
Height: 1.125"

Used for triodes, rectifiers, same size as base found on 2A3, 300B, etc. There is a brass locator rod on side of base between the two smaller pins. Made your own tubes.
Detailed Images
Our Company

Shenzhen Hanlongjia Technology Co., Ltd was established in 2005 and now it is a thriving manufacturer in the industry of metal processing, vacuum tube, tube socket, knob, terminal board and others. We have factory (total area: 20,000sqm).

Our main products are tube amplifier parts and guitar amplifier parts including vacuum tube, tube socket, rocker switch, push button switch, toggle switch, changeover switch, panel meter, capacitor, RCA plug, binding post, tag board, knob, power plug and so on. In order to extent our business, we develop new product gramophone.

With many years effort, our export business and domestic trade have been developing very rapidly. We welcome OEM and ODM businesses. We have hundreds of product styles and a wide range of products exported worldwide and sold well in South America, Europe, the Middle East and Asia. Our customers are always satisfied with our services and competitive prices.

Our Service

1. OEM/ODM factory direct
2. professional engineers who have the ability to create what customers need
3. high quality guarantee with competitive price
4. have a full set of testing equipment for products' functions to ensure reliable quality
5. fast feedback within 2 hours
6. shipping on-time
7. aftersale service, if any reason in our side, we can free exchange for you.
8. all of our product have attained CE, ROHS and related certificates approval.

Shipping Way

1) What's the minimum quantity?
Re: 100pcs, but if you have sample order less than 100pcs, we can also help you, so strictly speaking we haven't minimum quantity limit, just the more quantity the cheaper.

2) Are we factory or trade company?
Re: We are professional manufacturer and we have factory.

3) Can we custom produce accroding to client's request?
Re: Yes, we accept OEM.

4) How can we pay?
Re: We accept L/C, T/T, Western Union, PayPal.

5) How can we deliver our goods?
Re: Express delivery (DHL,UPS,FEDEX,TNT), air delivery, sea delivery.
We can suggest the economic solution according to your request.

Transaction History of the Supplier

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Transaction Overview


Transaction Details

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China (Mainland)
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Supplier Assessments:
4 Transactions 6,000+
The supplier’s transactions conduted via Alibaba.com in the past 6 months.
The supplier supports Trade Assurance – A free service that protects your orders from payment to delivery.
Supplier's Trade Assurance Limit: US $35,000
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