EIMAC 4X4-250A Rogers Tube Ham Amplifier Radio AX4-250A 6156

( Brand: Eimac ), ( Manufacturer Part Number: 4X4-250A ), ( Type: Tube )

Review EIMAC Rogers Tube Ham Amplifier Radio Made In Canada

Eimac 4x4-250A / Rogers AX4-250A Tube 6156 Ham Amplifier Radio - Powerful Linear Amplifier for Amateur Radio Enthusiasts

The Eimac 4x4-250A, also known as the Rogers AX4-250A Tube 6156 Ham Amplifier Radio, is a high-performance linear amplifier designed specifically for amateur radio operators. This powerful device is renowned for its exceptional quality and reliability, making it an ideal choice for long-distance communications and DXing.

This amplifier features four 6156 tubes, each capable of delivering 250 watts of RF output power, resulting in a remarkable total of 1000 watts PEP. The 4:1 output transformer ensures efficient power handling, while the robust construction with a finned aluminum heatsink ensures optimal heat dissipation, enabling the amplifier to maintain its performance even under heavy load.

The Eimac 4x4-250A/Rogers AX4-250A is equipped with a high-quality tubeSOV (Tube Solid-State Output Voltage) circuit, which offers excellent linearity and stability, reducing the need for frequent tube adjustments. The front panel includes a meter for monitoring plate voltage and current, while the rear panel offers a variety of connectors for easy installation and integration with your existing radio setup.

This amplifier is designed to provide a clean, efficient, and powerful signal, making it an excellent choice for those seeking to push their communications to the farthest reaches. Whether you're a seasoned ham radio operator or just starting out, the Eimac 4x4-250A/Rogers AX4-250A Tube 6156 Ham Amplifier Radio is a reliable and capable companion for your amateur radio adventures.

The Eimac 4x4-250A and Rogers AX4-250A tube 6156 Ham Amplifier Radio, both high-power tetrode amplifiers, have several key features and potential drawbacks to consider before making a purchasing decision.

1. High Power Output: This amplifier delivers a continuous power output of 250 watts, making it suitable for high-power applications.

2. Quad Tetrode Configuration: The quad tetrode design offers improved linearity and efficiency compared to other amplifier configurations.

3. Rugged Construction: Eimac is known for its durable designs, and the 4x4-250A is no exception, with a robust construction that can withstand harsh operating conditions.

4. Wide Operating Frequency Range: The amplifier can operate from 1.8 to 54 MHz, making it versatile for various amateur radio bands.

5. High Current Handling: With a maximum plate current of 350 mA, the 4x4-250A can handle high current loads effectively.

1. Size and Weight: Due to its robust construction and high power output, the 4x4-250A is larger and heavier than some other amplifiers, which may make it less portable.

2. Higher Cost: Compared to some other amplifiers, the 4x4-250A may be more expensive, which could be a deterrent for budget-conscious hobbyists.

1. High Power Output: Like the Eimac 4x4-250A, the Rogers AX4-250A delivers a continuous power output of 250 watts.

2. Quad Tetrode Configuration: The quad tetrode design improves linearity and efficiency, similar to the Eimac 4x4-250A.

3. Wide Operating Frequency Range: The amplifier can operate from 1.8 to 54 MHz, making it versatile for various amateur radio bands.

4. High Current Handling: With a maximum plate current of 350 mA, the AX4-250A can handle high current loads effectively.

1. Availability: The Rogers AX4-250A may be less common and harder to find compared to other amplifiers, which could impact its price and availability.

2. Potential Quality Issues: Some users have reported quality control issues with Rogers products in the past, although this may vary depending on the specific unit and manufacturer.

Both the Eimac 4x4-250A and Rogers AX4-250A are high-quality, high-power tetrode amplifiers suitable for amateur radio applications. If portability is a concern, the smaller size and weight of some other amplifiers might be more appealing. However, for those who prioritize power output, linearity, and efficiency, the quad tetrode design of both the Eimac 4x4-250A and Rogers AX4-250A makes them strong contenders. Ultimately, the choice between the two depends on the user's specific needs, budget, and preference for brand or availability.

For those seeking a high-power, high-quality amplifier, either the Eimac 4x4-250A or Rogers AX4-250A could be a good choice. It is recommended to research multiple retailers to find the best price and availability. Additionally, it is important to ensure that the amplifier is compatible with the user's existing radio equipment before making a final decision.

Details:

ROGERS AX4 250A 6156 TUBE.

part #: 4x4250a price

• $182.89

specifications hamamateuradio:

• brand: Eimac
• mpn: 4x4-250a
• type: Tube

offer hamamateuradio:

• started: July 24, 2025
• options: Ship-to-home
• quantity: 1
• availability: In Stock
• sold: 0

seller hamamateuradio:

• city: Memphis, Tennessee
• rating: 98.5%
• # reviews: 3042

general hamamateuradio:

• condition: Used
• Radio Communication > Ham, Amateur Radio > Ham Radio Amplifiers

returns hamamateuradio:

• policy: No Returns

payments hamamateuradio:

• credit card: Diners-club
• wallet: Paypal
• other

shipping hamamateuradio:

• service: Economy
• cost: $0.00
• type: Fixed
• transit: 4-9 Days
• class: Economy

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