ELECRAFT E100401 Right Panel KX3

( Brand: Elecraft ), ( Manufacturer Part Number: E100401 ), ( Part Type: Panel )

Review ELECRAFT Original Kx3 Right Side Panel

The Elecraft KX3 s right-hand panel is a meticulously engineered assembly that embodies the spirit of modern portable QRP (low-power) radio design, blending functionality with uncompromising performance. At its core, this panel houses the **100-watt linear amplifier module (E100401)**, a robust yet compact solution that transforms the KX3 s already potent 10-watt output into a full 100 watts of clean, efficient power ideal for contesting, DXing, or making strong local contacts without sacrificing portability. The amplifier s design prioritizes reliability, featuring a **high-efficiency Class-D topology** that minimizes heat dissipation while delivering exceptional linearity, ensuring minimal distortion even at peak power levels. The module s rugged construction, with its **shielded connectors and robust mounting points**, is built to endure the rigors of field operation, whether deployed in a rugged case, a vehicle, or a temporary shack setup.

The right panel also integrates seamlessly with the KX3 s **automatic antenna tuner**, allowing the amplifier to operate efficiently across a wide range of antenna impedances from simple dipoles to complex verticals without manual adjustments. This tuner-amplifier synergy ensures that users can focus on making contacts rather than troubleshooting mismatches, a hallmark of Elecraft s user-centric engineering philosophy. The panel s **dual-band coverage** (160 meters through 10 meters) means the amplifier is ready for any band, with minimal switching overhead, while its **automatic band switching** further streamlines operation by eliminating the need for manual adjustments when changing frequencies. The inclusion of a **built-in power meter** provides real-time feedback on transmitted power, enabling precise control and monitoring, which is invaluable for both competitive and casual operators alike.

Beyond its technical prowess, the right panel s design reflects Elecraft s commitment to **ergonomic usability**. The **clearly labeled connectors** including the robust **SMA inputs and outputs**, **DC power jack**, and **control line connectors** ensure easy integration with external accessories, from antennas to power supplies. The **modular approach** allows for flexible deployment, whether the amplifier is used as a standalone unit or integrated into a larger station setup. Additionally, the panel s **compact yet sturdy form factor** makes it an ideal companion for portable operations, where space and weight are at a premium, yet performance cannot be compromised. Whether deployed in a field day setup, a remote location, or as part of a home station s expansion, the E100401 amplifier module on the KX3 s right panel delivers the power and reliability needed to push the boundaries of what s possible with a QRP rig.

### **Pros and Cons of buying a Elecraft KX3 (Right Panel, Model E100401)**

#### **Pros**

1. **Compact and Portable Design**

The KX3 is one of the most portable HF transceivers available, weighing just under 2 pounds. Its small size makes it ideal for field operations, travel, and portable operating (QRP). The right-panel version (E100401) includes additional features like a built-in antenna tuner and a more robust power supply interface, enhancing its utility without significantly increasing bulk.

2. **Excellent Performance and Build Quality**

Elecraft has a reputation for high-quality construction, and the KX3 lives up to that standard. The transceiver is rugged, with a solid metal chassis that protects internal components. It handles high power efficiently (up to 10 watts on HF, though most operators use it at lower levels for QRP) and delivers clear, distortion-free audio.

3. **Versatile Operating Modes**

The KX3 supports SSB (USB/LSB), CW, and FM (for 6m). While it lacks digital modes like PSK or FT8 natively, it can be paired with an external sound card for those modes, making it adaptable for modern contesting and DXing. The right panel includes a built-in antenna tuner, which simplifies matching antennas in the field.

4. **User-Friendly Interface**

The KX3 features a straightforward, intuitive control layout. The right panel adds a few extra knobs and switches (such as a dedicated CW key jack and a more accessible power input), making it easier to operate without constantly referring to the manual. The display is clear, and the menu navigation is logical for beginners and experienced operators alike.

5. **Strong Community and Support**

Elecraft has a dedicated user base, and the KX3 is widely regarded as one of the best QRP transceivers. There is extensive documentation, tutorials, and aftermarket accessories (e.g., better speakers, external power supplies) available. The company also provides excellent customer support, which is crucial for troubleshooting or upgrades.

6. **Compatibility with Modern Accessories**

The KX3 s USB port allows for computer control via Elecraft s software (e.g., K3S software for digital modes) or third-party programs like N1MM Logger. This makes it suitable for contesting, logging, and integrating with automated operating setups.

7. **Right Panel Enhancements**

- A dedicated CW key jack (eliminating the need for an external keyer in some cases).

- A more accessible power input (simplifying field operation with external power supplies).

- A slightly improved layout for easier operation with gloves or in less-than-ideal conditions.

8. **Cost-Effective for the Features**

While the KX3 is not the cheapest transceiver on the market, its combination of portability, performance, and versatility makes it a cost-effective choice for serious hobbyists. The right panel version adds modest value without a significant price increase.

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#### **Cons**

1. **Limited Power Output**

The KX3 is officially rated for 10 watts PEP on HF, but most operators use it at much lower power levels (often 5 watts or less) due to its QRP focus. If you need higher power for long-distance contacts or contesting, you may need to pair it with an external amplifier, which adds complexity and cost.

2. **No Built-In Digital Modes**

Unlike some modern transceivers (e.g., the Yaesu FT-991 or Icom IC-7300), the KX3 does not natively support digital modes like PSK31, FT8, or JT65. While it can be used with an external sound card for these modes, this requires additional hardware and software, which may not appeal to operators who prioritize simplicity.

3. **Basic Audio and Speaker**

The built-in speaker is adequate for casual operation but lacks the clarity and volume of higher-end transceivers. Operators often upgrade to an external speaker or headphones for better audio quality, especially in noisy environments.

4. **No Built-In Memory Channels**

The KX3 does not have memory channels for frequencies or settings, which can be inconvenient for quick tuning or recalling specific frequencies. While this is not a dealbreaker for many, it may frustrate operators who rely heavily on memory features.

5. **Limited Bandwidth for SSB**

The KX3 s filter bandwidth is narrower than some other transceivers, which can make SSB reception slightly more challenging in noisy conditions. While this is not a major issue for most operators, it may require additional filtering or external hardware for optimal performance.

6. **Dependence on External Power for Field Use**

While the KX3 is portable, its battery life is limited when running on internal power. For extended field operations, you ll need an external power supply (e.g., a 12V battery or solar panel), which adds to the setup complexity.

7. **No Built-In Antenna Tuner in Base Models (Right Panel Helps)**

The standard KX3 does not include a built-in antenna tuner, which can be a drawback for operators who frequently change antennas. The right panel version (E100401) includes a tuner, but this is still an extra feature that some may consider unnecessary if they already have an external tuner.

8. **Learning Curve for Advanced Features**

While the KX3 is user-friendly, some of its advanced features (e.g., CW keying, digital mode integration, or antenna tuning) may require a bit of learning. Beginners might find themselves consulting the manual or online resources more often than with a simpler transceiver.

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### **Conclusion**

The Elecraft KX3 (right panel, E100401) is one of the most capable and versatile QRP transceivers available, offering a perfect balance of portability, performance, and ease of use. Its compact size, robust build, and excellent audio quality make it ideal for field operations, portable operating, and casual HF communication. The right panel adds practical enhancements like a built-in antenna tuner and a dedicated CW key jack, making it even more user-friendly for serious operators.

However, it is not without limitations. The lack of native digital modes, limited power output, and basic audio may be drawbacks for some users, particularly those who prioritize modern features or higher power. Additionally, its simplicity such as the absence of memory channels may not suit operators who rely heavily on automated frequency recall.

For most hobbyists, especially those who value portability, reliability, and high performance in a small package, the KX3 is an excellent choice. It is particularly well-suited for:

- Field day operations and portable QRP setups.

- Operators who enjoy CW and SSB but do not need digital modes.

- Those who appreciate Elecraft s build quality and community support.

- Beginners and experienced operators alike who want a transceiver that is easy to use and highly adaptable.

If you prioritize modern features like digital modes, higher power output, or built-in memory channels, you may want to consider alternatives like the Yaesu FT-991 or the Icom IC-7300. However, for the vast majority of HF enthusiasts, the KX3 remains a top-tier choice.

### **Recommendation**

- You want a portable, high-performance HF transceiver for field operations or portable QRP.

- You prioritize reliability, build quality, and ease of use.

- You are comfortable with QRP power levels (5 watts or less) and do not require high power for contesting.

- You enjoy CW and SSB and are open to using an external sound card for digital modes if needed.

- You appreciate Elecraft s support and the active user community.

- You need native digital mode support (e.g., FT8, PSK).

- You require higher power output (100 watts) for contesting or long-distance contacts.

- You prefer a transceiver with built-in memory channels or more advanced automation features.

- You are on a tight budget and can find a used or refurbished model with similar features at a lower cost.

Overall, the KX3 is a fantastic investment for anyone serious about HF communication, especially in portable or field settings. Its combination of performance, portability, and user-friendliness makes it a standout choice in the QRP transceiver market.

Details:

See all photos. In great shape. Original Elecraft KX3 Right Side Panel E100401. Availability: In Stock and ready to ship.

part #: e100401 price

• $19.99

specifications hamamateuradio:

• brand: Elecraft
• mpn: E100401
• part type: Panel

returns hamamateuradio:

• policy: Returns Accepted
• time: 30 Days
• method: Money back
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• best offers: True
• quantity: 1
• started: March 22, 2026
• options: Ship-to-home
• sold: 0
• availability: In Stock

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

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• city: Olney, Maryland
• # reviews: 14246

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