JETSTREAM JT405C58 Trunk Tailgate Antenna Mount Coax SO-239

( Brand: Jetstream ), ( Manufacturer Part Number: JT405C58 ), ( Compatible Brand: Universal ), ( Compatible Model: Various ), ( Band: Hf, Uhf, Vhf ), ( To Fit: Tailgate ), ( California Prop 65 Warning: Www.p65warning.ca.gov ), ( Type: Antenna Mount ), ( Unit Type: Unit ), ( Features: So-239 ), ( Country Of Origin: Taiwan )

Review JETSTREAM Adjustable Trunk Tailgate Antenna Mount Coax Assembly

The **Jetstream JT405C58 SO-239 Trunk Tailgate Antenna Mount Coax** is a high-performance, versatile mounting solution designed for enthusiasts and professionals who demand reliability, durability, and precision in their antenna installations. This robust kit is engineered to securely fasten antennas to the trunk or tailgate of vehicles, ensuring optimal signal transmission while withstanding the rigors of daily use, including exposure to varying weather conditions, vibrations, and road debris. The **SO-239** connector interface is a universal standard, making it compatible with a wide range of antennas, from mobile two-way radios and CB radios to amateur radio gear, GPS devices, and emergency communication systems. The mounting system features a **sturdy, corrosion-resistant aluminum bracket**, which is both lightweight and strong enough to handle the weight of most antennas without compromising structural integrity. The bracket is designed to clamp securely around the trunk or tailgate, providing a tight, vibration-dampening fit that minimizes signal interference caused by movement. The included **high-quality coax cable** is shielded to reduce electromagnetic interference (EMI) and signal loss, ensuring clear and consistent performance whether you're on the road, at a remote site, or in a high-noise environment. The kit s modular design allows for easy installation and removal, making it ideal for temporary setups or frequent relocations. Whether you're a ham radio operator, a fleet manager, a public safety professional, or a tech-savvy driver looking to enhance their vehicle s communication capabilities, the Jetstream JT405C58 offers a dependable, all-in-one solution that bridges the gap between functionality and convenience. Built to last, this antenna mount is a testament to Jetstream s commitment to quality engineering, delivering a product that is as practical as it is performant.

The **Jetstream JT405C58 SO-239 Trunk Tailgate Antenna Mount Coax** is a popular choice for portable and mobile amateur radio operations, particularly for those using HF (High Frequency) radios like the Yaesu FT-817ND or similar. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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### **Pros**

1. **Portability and Mobility**

The antenna is designed for trunk-mounted installation, making it ideal for vehicles, trailers, or portable setups. This allows users to operate from remote locations without needing a fixed installation.

2. **Compact and Lightweight**

The antenna is relatively small and lightweight, which is advantageous for portable operations where space and weight are concerns. It can be easily carried in a backpack or vehicle without adding significant bulk.

3. **SO-239 Connector Compatibility**

The SO-239 connector is a standard in amateur radio, ensuring compatibility with most HF radios, amplifiers, and other accessories. This makes it easy to integrate into existing setups without additional adapters.

4. **Versatile Mounting Options**

The trunk tailgate mount is versatile and can be used in various vehicles, including cars, SUVs, and trucks. It can also be adapted for portable use by attaching it to a tripod or other support structure.

5. **Good Performance for Portable Use**

While not a high-performance antenna for fixed installations, it provides decent performance for portable and mobile operations, especially on the HF bands. It can handle basic communications for local and regional contacts.

6. **Affordability**

Compared to more advanced mobile antennas, this is a cost-effective option for those who need a portable solution without investing in a full mobile antenna system.

7. **Easy to Install and Remove**

The design is straightforward, allowing for quick setup and takedown. This is particularly useful for field day operations or emergency communications where time is a factor.

8. **Durability**

The materials used appear to be sturdy enough for regular use, though durability may vary depending on environmental conditions (e.g., exposure to weather, rough handling).

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### **Cons**

1. **Limited Performance for Mobile Use**

While suitable for portable operations, this antenna is not optimized for mobile use (e.g., driving while transmitting). Mobile antennas typically require a more robust design to handle the forces of movement and provide better radiation efficiency. Using this antenna while driving could result in poor performance or even damage to the antenna or radio.

2. **Not Ideal for High-Power Operations**

The antenna is not designed for high-power transmissions, which could lead to overheating or reduced lifespan. For high-power use, a dedicated mobile antenna with better cooling and construction is recommended.

3. **Potential for Interference**

In some cases, the antenna s design may pick up interference from the vehicle s electrical systems, especially if not properly grounded or shielded. This can affect signal quality.

4. **Limited Bandwidth**

The antenna may not cover all HF bands efficiently, and performance could vary significantly across different frequencies. Users may need to tune or adjust the antenna for optimal performance on specific bands.

5. **Dependence on Mounting Stability**

The performance of the antenna relies heavily on a stable mounting point. If the trunk tailgate is not rigid or if the antenna is not securely attached, wind or movement could affect its operation.

6. **No Built-in Tuning**

Unlike some mobile antennas that include automatic tuning or matching networks, this antenna requires manual tuning or the use of an external tuner (if available on the radio). This can be inconvenient for quick setups.

7. **Potential for Damage in Rough Conditions**

While durable for typical use, exposure to harsh weather (e.g., heavy rain, snow, or extreme temperatures) could degrade the antenna over time. It lacks the ruggedness of some dedicated mobile antennas.

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### **Conclusion**

The **Jetstream JT405C58 SO-239 Trunk Tailgate Antenna Mount Coax** is a solid choice for **portable and occasional mobile amateur radio operations**, particularly for those who prioritize simplicity, affordability, and ease of use. It excels in scenarios where a fixed installation is not feasible, such as field day events, emergency communications, or travel. However, it is **not suitable for high-power or continuous mobile use** due to its limitations in performance, durability, and stability under movement.

For users who primarily operate from their vehicle while driving, a dedicated mobile antenna (e.g., a collinear or vertical antenna with a proper mount) would be a better investment. For portable operations where mobility is key, this antenna provides a practical and cost-effective solution.

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### **Recommendation**

- **Buy it if:** You need a portable HF antenna for field operations, emergencies, or travel where a fixed installation is not possible. You are using low to moderate power and prioritize simplicity and affordability.

- **Avoid it if:** You plan to use it for mobile operations while driving, require high-power transmission, or need consistent performance across all HF bands. In these cases, invest in a dedicated mobile antenna system.

- **Pair it with:** A good portable radio (e.g., Yaesu FT-817ND), an external tuner if needed, and proper grounding to minimize interference. Consider adding a coax cable with sufficient length and quality to reduce signal loss.

Details:

This product is compatible with universal brands and model's, making it a flexible option for ham radio enthusiasts other users. The Jetstream JT405C58 SO-239 Adjustable Trunk Tailgate Antenna Mount Coax Assembly is a versatile and reliable antenna mount designed for various radio communication devices. Good condition which shows some wear due to being exposed the elements. As is see photos.

The adjustable trunk tailgate design allows for convenient positioning to achieve optimal signal reception, while the SO-239 feature ensures a secure connection. Made in Taiwan, this unit is easy to install and provides a sturdy support for your antenna system.

part #: jt405c58 prices

• $46.95-$59.95

specifications hamamateuradio:

• brand: Jetstream
• mpn: Jt405c58
• compatible brand: Universal
• compatible model: Various
• band: Hf, Uhf, Vhf
• to fit: Tailgate
• california prop 65 warning: Www.p65warning.ca.gov
• type: Antenna Mount
• unit type: Unit
• features: So-239
• country of origin: Taiwan

payments hamamateuradio:

• credit card: Mastercard
• other
• wallet: Google-pay

seller hamamateuradio:

• city: Moncks Corner, South Carolina
• # reviews: 261
• rating: 100.0%

offer hamamateuradio:

• best offers: True
• availability: In Stock
• quantity: 1
• options: Ship-to-home
• started: May 19, 2026
• sold: 0

general hamamateuradio:

• condition: Used
• Radio Communication > Ham, Amateur Radio > Other Ham Radio Equipment

shipping hamamateuradio:

• class: Standard
• service: USPS Ground Advantage
• transit: 7-10 Days
• cost: $9.69
• carrier: USPS
• type: Calculated

returns hamamateuradio:

• policy: No Returns

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