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Dongguan Chenghao Machinery Co., Ltd.

8t20rb, Electron Tube 8t20rb, Oscillation Tube 8t20rb manufacturer / supplier in China, offering Electron Tube Oscillation Tube 8t20rb, High Frequency Power Tube Triode Tube Electron Tube 7t85rb, High Stability Crystal Triode Tube High Frequency Toshiba 7t69rb Oscillator Tube with Ce and so on.

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Supplier Homepage Product Other Manufacturing & Processing Machinery Electron Tube Oscillation Tube 8t20rb

Electron Tube Oscillation Tube 8t20rb

FOB Price: US $600 / Piece
Min. Order: 1 Piece
Min. Order FOB Price
1 Piece US $600/ Piece
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Production Capacity: 1000
Transport Package: Wooden Box
Payment Terms: L/C, T/T, D/P, Western Union, Paypal, Money Gram

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Basic Info
  • Model NO.: 8T20RB
  • Product Brand: Toshiba
  • Product Type: Electron Tube
  • Frequency: 42MHz(Max)
  • Current: 40A
  • Weight: 7.3kg
  • Specification: 7.3kg
  • HS Code: 8501109101
  • Product Name: 8t20rb
  • Condition: New
  • Use: High Frequency Machine Accessories
  • Voltage: 12V
  • Length: 293mm
  • Trademark: chenghao
  • Origin: China
Product Description
Product Details
GENERAL DATA  ELECTRICAL  :
Filament :Thoriated Tungusten 
Voltage  ········································ 12.6 V
Current  ··········································· 35 A
Transconductance (Ib=0.8A)  ··················································································· 13 mS Amplification Factor  ································································· 21 - Interelectrode Capacitances  :
Grid - Plate  ········································································································· 13 pF
Grid - Filament  ····························································································· 18 pF
Plate - Filament ···························································································· 0.7 pF
Frequency for Maximum Ratings ················································································· 110 MHz 
MECHANICAL :
Overall Dimensions :
Length  ··································································· 238 mmDiameter (Max.)
Vertical Plate Up or Down·············································································· 128mm Mass
·Mounting Position············································· 2.8   
Cooling:
Plate :Forced Air Cooling 
Minimum Air Flow  ································································································ 7 m3/min Minimum Static Pressure Loss  ··········································································· 35 mm Water Maximum Radiator Temperature ····················································· 250 ºC Maximum Incoming Air Temperature ··········································· 45 ºC
Maximum temperature on Filament and Grid Seals ························································· 250 ºC
Recommended Air Jacket ····················································· TOSHIBA VT-29035A
Operation and Handling

Since the power consumption of transmitting tubes is generally high, the voltages applied to each electrodes are high and the temperature of the electrodes rises accordingly.Therefore, incorrect operation may result in personal injury.In addi-tion, it is difficult to determine the mechanical design strength of a transmitting tube from its external appearance.

Therefore, all personnel who work with transmitting tubes must have a thorough understanding of correct operating pro-cedures to prevent damage and must handle such tubes with extreme care.

System designers and personnel involved in performing work are responsible for ensuring worker safety.
1.Applications and objectives

This product is intended for use in industrial equipment only.It is not to be sold to or used by the general pub-lic.
This product is not designed or intended for use in combination with equipment in which malfunction or incor-rect operation could lead to personal injury or death, Such use is strictly prohibited.
Refer to delivery specifications and engineering information issued by Toshiba to ensure safe operation of this product.

2.Ambient conditions

Store this product in a dry location (relative humidity < 60 %).Do not store this product in a location where the temperature or humidity may change rapidly because condensation may form on the surface of the product.
A filter should be used because accumulated dust will lead to deterioration of withstand voltage and may gen-erate smoke or catch fire.

3.Precaution against incorrect or inappropriate operation

If this product is operated with an excessively high voltage or current, X-rays exceeding the standard may be generated.Never use this product with a voltage or current exceeding the rated values.
Prior consultation with Toshiba is required if this product is to be used under conditions other than those speci-fied or if it is used for a new type of equipment.
Before using this product, determine whether or not it can be used for industrial heating applications.

4.Only qualified engineers are permitted to use, assemble, maintain, or check this product.Other personnel are prohibited from handling this product.

4.1 Precautions for operation and maintenance

To ensure that the end user is aware of the safety precautions, include the descriptions given in the safety precau-tions in the operations manual provided with the equipment or take other appropriate actions.

4.2 High voltage

The voltage applied to the electrodes of the power tube can exceed 10kV, which is deadly, and the equipment must be designed properly and operating precautions must be followed.

5.Safety features to be incorporated in the design

*The following safety features should be incorporated in the system design:

The equipment must be designed to prevent personnel from coming into contact with high circuit.*Interlock switches must be provided on access doors, so that when these are opened for inspection or re-placement of the tube, power supply is turned off and high-voltage capacitors are discharged.

*The power supply cannot be turned on again unless the access boor is fully closed.

5.1Safety precautions for inspection and replacement to tube

It is preferable to request that the system manufacturer send an engineer to inspect and replace the tube;If this is not possible, two or more qualified persons well-trained in electrical work can perform the inspection and replacement.In either case, all power supplies must be turned off before beginning any service proce-dure, and parts being inspected or replaced must be grounded with aground bar.

5.2  High temperature

Although a cooling system is used, the electrode terminals are very hot both during and after operation.Do not touch the tube just after turn off the power;Wait until the temperature decreases enough not to be dangerous.

Our Company

Dongguan Chenghao Machinery Co., Ltd.Has been committed to R&D, production and sales of the plastic welding field ever since its establishment in 1995.
We are professional designer and manufacturer of High Frequency Welding Machine, Ultrasonic Plastic Welding Machine, Blister Forming Machine, Tube Sealing and Filling Machine and other Packing Machine with over 10 years.
We welcome both new and regular customers at home and abroad to visit us and cooperate with us to achieve mutual profits and create a better future.We are convinced that your partnership with us can help your business scale a new high.

FAQ
Q:Are you factory?
A:Yes, We are factory, all machine is made by ourself and we can provide customize service according to your requirement.
Q:Where is your factory?Can I visit your factory?
A:Our factory is located on Dongguan city which near Shenzhen and Guangzhou City.We are warmly welcome you to visit our factory, we can pick you up when you come to Dongguan bus or train station.
Q:How to buy your machine?
A:Please send me inquiry to our email, when we reach a agreement, we will sign a contract to confirm our order.
Q:How to contact you?
A:You can click the "Contact Supplier" in the top of this page or contact me from the buttom contact info, we will reply to you via E-mail or phone call within 12 hours.
Q:What about your warranty?
A:Our warranty is 1 years, all machine part can be replaced for free within 1year if broken(not including man made).
Q:How long we will get the machine?
A:We and our clients usually choose the delivery by sea, so onece you place the order, we will arrange the delivery within 3days, and about 7-35days(depend the destination port) you will get the machine.
Q:Are we still need to install the machine after we got?
A:We will adjust the machine before we deliver to you, also we will send you video and manual to teach you how to use the machine.
Q:How can you guarantee we receive a good quality?
A:First, we have Q/C department to control the quality.When the machine was finished,we will send you the inspection video and pictures.Or you can come to our factory to inspect the machine before you arrage shipment.

To our friend
To give you the best service, we need your full products information(material, welding size, working-efficiency required tec), If you have any question about our products, please feel free contact me, we will try our best to satisfy you!
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