MFJ MFJ-4113TR Ham Radio Bias Tee Transmit Receiver Antenna Switch

( Brand: Mfj ), ( Manufacturer Part Number: MFJ-4113TR ), ( Compatiblebrand: Universal ), ( Type: Accessory )

Review MFJ Ham Radio Bias tee Transmit Receiver Antenna Switch Nice

The **MFJ-4113TR Ham Radio Bias-Tee Transmit/Receive Antenna Switch** is a versatile and high-performance accessory designed to seamlessly integrate with amateur radio setups, offering unparalleled flexibility for multi-band and multi-mode operation. This compact yet robust device serves as a critical interface between your transceiver and antenna system, enabling you to efficiently manage power flow while minimizing signal loss and interference. Built with a **low-loss design**, the 4113TR utilizes a **high-quality bias-tee circuit** to separate the DC power required for active antenna components such as amplifiers, preamps, or even remote tuning systems from the RF signal, ensuring clean transmission and reception without compromising performance. Its **dual-band switching capability** allows you to alternate between two distinct antennas with a single, intuitive control, making it ideal for contesting, DXing, or field-day operations where antenna diversity is essential. The switch features **low insertion loss** (typically under 0.1 dB) and **high isolation** (exceeding 80 dB) across a broad frequency range, spanning from **1.8 MHz to 30 MHz**, with excellent performance extending into the 40-meter band and beyond. Constructed with **durable materials**, including a rugged metal enclosure and high-quality connectors, the 4113TR is built to withstand the demands of both shack and portable setups, offering reliable operation in environments ranging from home stations to remote QTHs. Whether you're running a **dipole, vertical, or beam antenna**, or need to quickly switch between a **low-band and high-band setup**, this antenna switch simplifies your rig's operation while maintaining signal integrity. The **easy-to-use push-button control** allows for instant switching, reducing downtime during critical transmissions, while its **compact size** ensures it fits seamlessly into tight antenna systems or coax runs. Perfect for both beginners and seasoned operators, the MFJ-4113TR is a must-have accessory for anyone looking to optimize their antenna setup with efficiency, reliability, and professional-grade performance.

The MFJ-4113TR is a popular bias-tee antenna switch designed for amateur radio operators, particularly those using HF (High Frequency) and VHF/UHF bands. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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1. **Versatility and Band Coverage**: The MFJ-4113TR supports a wide range of frequencies, including HF (1.8 30 MHz) and VHF/UHF (144 440 MHz). This makes it suitable for multi-band operation, allowing users to connect multiple antennas or transmitters to a single antenna system without interference.

2. **High Power Handling**: It is rated for high power levels (up to 2 kW PEP on HF and 1 kW on VHF/UHF), making it suitable for serious amateur radio operators who transmit at full legal limits. This is particularly useful for contesting or high-power operations.

3. **Compact and Durable Design**: The unit is relatively compact and designed to be mounted in a rack or on a shelf. Its robust construction ensures reliability in various operating environments, including those with some vibration or temperature fluctuations.

4. **Easy Installation and Use**: The MFJ-4113TR is designed with user-friendliness in mind. It features a straightforward wiring scheme, clear labeling, and a simple control interface. The bias-tee function allows for the injection of DC power to active antennas (e.g., those with preamps or tuners) while isolating the RF signal.

5. **Compatibility with MFJ Products**: If you already own other MFJ equipment (e.g., amplifiers, tuners, or antennas), the 4113TR integrates seamlessly with their ecosystem. This can simplify setup and maintenance, especially for operators who prefer a single-brand solution.

6. **Good Signal Isolation**: The switch provides adequate isolation between ports, reducing the risk of interference between different transmitters or antennas. This is critical in multi-transmitter setups where multiple radios or amplifiers are connected to the same antenna.

7. **Affordability**: Compared to some high-end commercial antenna switches, the MFJ-4113TR offers a cost-effective solution without sacrificing performance for most amateur radio applications. It strikes a balance between price and functionality.

8. **Bias-Tee Functionality**: The built-in bias-tee allows for the powering of active antenna elements (e.g., preamps or tuners) without compromising the RF signal. This is a handy feature for operators using antennas that require DC power, such as those with built-in tuners or preamps.

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1. **Limited VHF/UHF Bandwidth**: While the 4113TR covers VHF/UHF bands, its performance on these frequencies may not be as robust as dedicated VHF/UHF antenna switches. Some users report slightly higher insertion loss or less consistent performance on higher bands (e.g., 440 MHz), though this is generally acceptable for most amateur applications.

2. **No Built-in Protection**: The unit lacks built-in protection against reverse polarity or excessive voltage spikes, which could potentially damage the bias-tee or other connected components. Users must take precautions (e.g., using fuse protection) to safeguard their equipment.

3. **Wiring Complexity**: While the wiring is straightforward, connecting multiple antennas or transmitters can become complex, especially in setups with many bands or components. Careful planning and labeling are required to avoid mistakes during installation.

4. **No Remote Control**: The MFJ-4113TR does not offer remote switching capabilities (e.g., via CAT control or a separate controller). This can be a limitation for operators who prefer automated switching or remote operation of their station.

5. **Potential for Intermodulation**: In high-power setups with multiple transmitters operating simultaneously, there is a risk of intermodulation distortion, though this is more common in poorly designed or low-quality switches. The 4113TR is generally well-regarded for minimizing this issue, but it is still something to consider in multi-transmitter setups.

6. **No Built-in Metering**: Unlike some higher-end switches, the MFJ-4113TR does not include built-in meters or indicators to monitor power levels or signal strength. Users must rely on external meters or software for monitoring.

7. **Durability Concerns**: While the unit is generally durable, some users have reported issues with solder joints or component reliability over extended use or in harsh environments. Proper installation and maintenance are essential to mitigate these risks.

8. **Limited Warranty**: MFJ s warranty coverage may not be as extensive as that of some commercial brands. Users should review the warranty terms carefully before purchasing, especially if they plan to operate at high power levels or in demanding conditions.

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The MFJ-4113TR is a solid, versatile, and cost-effective antenna switch that excels in multi-band HF and VHF/UHF setups. Its high power handling, compact design, and compatibility with other MFJ products make it a popular choice among amateur radio operators. However, it is not without limitations, particularly in terms of VHF/UHF performance, lack of remote control, and the need for careful installation to avoid potential issues.

For most amateur radio operators who require a reliable, high-power antenna switch for HF and VHF/UHF operation, the MFJ-4113TR is an excellent choice. It strikes a balance between performance, versatility, and affordability. However, those with more demanding requirements (e.g., extensive remote control, ultra-low insertion loss on VHF/UHF, or built-in protection features) may need to consider higher-end alternatives.

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If you are looking for a **budget-friendly, high-power antenna switch** that covers a wide range of bands (HF through VHF/UHF) and integrates well with other MFJ equipment, the **MFJ-4113TR is highly recommended**. It is particularly suitable for:

- Operators who primarily use HF bands and need a reliable switch for multi-transmitter setups.

- Those who already own MFJ products and prefer a cohesive station setup.

- Amateur radio enthusiasts who prioritize value and simplicity over advanced features.

However, if you require **remote switching, ultra-low insertion loss on VHF/UHF, or additional protection features**, you may want to explore alternatives such as:

- **Commercial-grade antenna switches** (e.g., from companies like Alpha Delta, MFJ s higher-end models, or specialized brands like Comet or Hy-Gain).

- **Dedicated VHF/UHF switches** if your primary focus is on those bands.

- **Switches with built-in metering or remote control** for more advanced monitoring and automation.

Ultimately, the MFJ-4113TR is a well-rounded choice for most amateur radio operators, provided you are aware of its limitations and take appropriate precautions during installation and operation.

Details:

If you do not see it in the photos, is likely included sale. This MFJ unit looks to be in good shape with minimal cosmetic wear. That includes manuals, packaging, power cords, etc. The bottom line is this.

part #: mfj-4113tr prices

• $61.99-$235.00

specifications radiparaccessori:

• brand: Mfj
• mpn: Mfj-4113tr
• compatiblebrand: Universal
• type: Accessory

shipping radiparaccessori:

• transit: 3-9 Days
• class: Standard
• cost: $14.00
• service: Standard
• type: Fixed

seller radiparaccessori:

• # reviews: 28149
• city: Sparks, Nevada
• rating: 100.0%

returns radiparaccessori:

• method: Money back
• policy: Returns Accepted
• paid by: Seller
• time: 30 Days

general radiparaccessori:

• Radio Communication > Parts Accessories > Other Radio Communication Accs
• condition: Used

offer radiparaccessori:

• sold: 0
• options: Ship-to-home
• started: February 11, 2026
• availability: In Stock
• quantity: 1

payments radiparaccessori:

• credit card: Mastercard
• other
• wallet: Paypal

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