EIMAC W9-739 Electron Tube Valve 4-400A

( Brand: Eimac ), ( Manufacturer Part Number: W9-739 ), ( Part Type: Tube Valve ), ( Unit Type: Unit ), ( Country/region Of Manufacture: United States )

Review EIMAC Electron Tube Valve

The EIMAC W9-739 is a 4-400A high power tetrode vacuum tube specifically designed for use in industrial and military applications. This tube is part of EIMAC's W-series, which is known for its high reliability and long service life.

The W9-739 operates on a cathode heater voltage of 6.3 volts and a plate voltage ranging from 1250 to 1750 volts. It is capable of delivering an anode current of up to 4.4 Amps, making it suitable for use in high power applications such as industrial rectifiers, voltage regulators, and RF power amplifiers.

The tube's glass envelope is made of high-quality borosilicate glass and is approximately 11 inches long and 3 inches in diameter. The metal base is made of nickel-plated brass for durability and heat dissipation. The tube is equipped with a stainless steel grid and a tungsten filament.

The W9-739 is designed to operate in extreme environments, with a maximum operating temperature of 150 degrees Celsius and a maximum operating voltage of 5000 volts. It is also rated for a maximum power dissipation of 50,000 watts.

This tube is known for its excellent electrical characteristics, including a low plate resistance, high gain, and low microphone pickup. It also features a low noise figure, making it an excellent choice for applications where low noise is critical.

The EIMAC W9-739 is a high-performance vacuum tube that offers excellent reliability, long service life, and high power handling capabilities. It is an essential component for industrial and military applications where dependable and efficient power handling is necessary.

A Comparative Analysis of the EIMAC W9-739 4-400A Electron Tube Valve

The EIMAC W9-739 4-400A is a high-power electron tube used in various applications, including industrial heating, X-ray generators, and high-voltage power supplies. This analysis aims to provide an objective comparison of the advantages and disadvantages of using this tube.

1. High Power Handling: This tube can handle a high power of 4,400A, making it suitable for high-power applications.

2. Long Life Span: The EIMAC W9-739 4-400A is designed for long-term operation, providing reliable performance over extended periods.

3. High Efficiency: The tube offers high efficiency, allowing for lower energy consumption and cost savings in the long run.

4. Rugged Construction: The tube's sturdy construction makes it suitable for use in harsh environments.

5. Versatile Application: The tube can be used in various applications, including industrial heating, X-ray generators, and high-voltage power supplies.

1. Size and Weight: The tube is relatively large and heavy, requiring additional space and support structures in applications.

2. Complexity: The tube's operation and maintenance can be complex, requiring specialized knowledge and equipment.

3. Cost: The EIMAC W9-739 4-400A is more expensive than solid-state alternatives, making it less cost-effective for some applications.

4. Vacuum Requirement: The tube must be operated in a vacuum environment, adding to the complexity and cost of the system.

The EIMAC W9-739 4-400A electron tube valve offers several advantages, including high power handling, long life span, high efficiency, rugged construction, and versatile application. However, it also comes with disadvantages, such as its size and weight, complexity, cost, and vacuum requirement.

The EIMAC W9-739 4-400A is an excellent choice for high-power applications where efficiency, reliability, and long life span are crucial factors. However, for applications where size, cost, and ease of use are more significant considerations, solid-state alternatives, such as transistors or thyristors, may be a more suitable option. Ultimately, the decision to use the EIMAC W9-739 4-400A depends on the specific requirements of the application and the trade-offs between power handling, complexity, cost, and size.

Details:

Please look at ALL pictures closely before purchasing. Photos are the best. Items may need a more in depth cleaning. I did purchase from a local operator.

I do a lot of business with them and they always have well cared for gear. Not saying it won't need adjustments but,it looks like a nice clean unit. I am not an operator and don't have the knowledge to fully test myself. Everything you see in the pictures is what included this lot.

part #: w9739 prices

• $84.95-$265.00

specifications vintacapacitor:

• brand: Eimac
• mpn: W9-739
• part type: Tube Valve
• unit type: Unit
• country/region of manufacture: United States

payments vintacapacitor:

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• transit: 5-11 Days
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• cost: $19.00

general vintacapacitor:

• Vintage Audio Video > Vintage Parts Accessories > Vintage Capacitors
• condition: Used

offer vintacapacitor:

• started: March 23, 2025
• sold: 0
• best offers: True
• options: Ship-to-home
• availability: In Stock
• quantity: 1

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• policy: No Returns

seller vintacapacitor:

• rating: 99.4%
• # reviews: 6801
• city: Federal Way, Washington

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