EIMAC ZO3208 Electron Tube Valve 4-400A

( Brand: Eimac ), ( Manufacturer Part Number: ZO3208 ), ( Part Type: Tube Valve ), ( Unit Type: Unit ), ( Country/region Of Manufacture: United States )

Review EIMAC Electron Tube Valve

The Eimac ZO3208 is a 4-400A high voltage electron tube, specifically designed for use in industrial and specialized applications. This vacuum tube is part of Eimac's Zener-Floater series, which offers excellent voltage regulation and stability, making it an ideal choice for power amplifiers, voltage regulators, and high voltage indicators.

The Eimac ZO3208 is a pentode tube, which means it contains five active elements: a control grid, a pair of screen grids, and two plates. The tube operates on a heater voltage of 6.3 volts and a filament voltage of 6.3 volts, with a total power consumption of approximately 25 watts. The tube's plate voltage can range from 300 volts to 4,000 volts, making it suitable for high voltage applications.

The Eimac ZO3208 has a maximum plate current of 4,000 amps, making it a powerful tube for handling large current loads. The tube's plate-to-cathode voltage drop is typically around 100 volts, providing ample headroom for various applications. This tube also features a long glass envelope with a base diameter of 8.5 inches and a total length of 15.5 inches.

The Eimac ZO3208 is known for its excellent thermal stability, which is essential for maintaining consistent performance in high power applications. It also offers good electrical characteristics, with a plate resistance of approximately 0.15 ohms and a grid-to-cathode leakage current of less than 2 microamps.

The tube's construction includes a high-quality, long-lasting filament, which is designed to provide reliable operation for extended periods. The tube is also equipped with a robust metal base and grid structure, ensuring durability and stability during operation.

In summary, the Eimac ZO3208 is a versatile and powerful high voltage electron tube, suitable for a wide range of industrial and specialized applications. Its excellent voltage regulation, high current handling capacity, and thermal stability make it a reliable and effective solution for high power applications.

A Comparative Analysis of the EIMAC ZO3208 4-400A Electron Tube Valve: Pros, Cons, and Recommendation

The EIMAC ZO3208 is a 4-400A electron tube valve that is widely used in various applications, particularly in high voltage and high current circuits. In this analysis, we will explore the key pros and cons of investing in this tube valve.

1. High Power Handling: The EIMAC ZO3208 can handle a high power output of 400A, making it suitable for applications that require significant current flow.

2. Long Life Span: Electron tube valves, in general, have a longer lifespan compared to their solid-state counterparts. The EIMAC ZO3208 is no exception, as it can last for thousands of hours with proper maintenance.

3. High Voltage Capability: This tube valve can operate at voltages up to 12,000V, making it a popular choice for high voltage applications.

4. Low Distortion: Electron tube valves are known for their low distortion, which is a crucial factor in certain applications, such as audio amplifiers and oscilloscopes.

5. Rugged Design: The EIMAC ZO3208 is built with a rugged design, ensuring that it can withstand harsh operating conditions.

1. Size and Weight: Electron tube valves, including the EIMAC ZO3208, are larger and heavier than their solid-state counterparts, which can make them less practical for portable applications.

2. Vacuum Maintenance: Electron tube valves require regular vacuum maintenance to ensure optimal performance, which can add to the cost and complexity of the system.

3. Limited Applications: While the EIMAC ZO3208 is versatile, it is not suitable for all applications. For example, it may not be the best choice for low power applications or applications that require fast switching times.

4. Fragility: Electron tube valves are more fragile than solid-state devices and can be easily damaged if not handled properly.

The EIMAC ZO3208 4-400A electron tube valve offers several advantages, including high power handling, long lifespan, high voltage capability, low distortion, and rugged design. However, it also comes with some disadvantages, such as size and weight, vacuum maintenance, limited applications, and fragility.

Based on this analysis, the EIMAC ZO3208 is an excellent choice for applications that require high power handling, low distortion, and high voltage capability. However, it may not be the best option for portable applications or applications that require fast switching times or low power consumption. Ultimately, the decision to invest in the EIMAC ZO3208 should be based on the specific requirements of the application and the trade-offs between its advantages and disadvantages.

If you are looking for a high power, low distortion, and high voltage tube valve, the EIMAC ZO3208 is a strong contender. However, if you require a smaller, lighter, or more rugged device, you may want to consider alternative solutions. Always consult with a qualified engineer or technical expert to determine the best option for your specific application.

Details:

Please look at all pictures closely before purchasing. I do a lot of business with them and they always have well cared for gear. Not saying it won't need adjustments but, looks like a nice clean unit. Photos are the best .

Everything you see in the pictures is what included this lot. I am not an operator and don't have the knowledge to fully test myself. Items may need a more in depth cleaning. I did purchase from a local operator.

part #: zo3208 prices

• $84.95-$265.00

specifications vintacapacitor:

• brand: Eimac
• mpn: Zo3208
• part type: Tube Valve
• unit type: Unit
• country/region of manufacture: United States

shipping vintacapacitor:

• cost: $19.00
• type: Fixed
• class: Standard
• transit: 6-12 Days
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general vintacapacitor:

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

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• quantity: 1
• started: March 23, 2025
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• availability: In Stock
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