Description
The USDX+ is a basic, but very capable radio, perfect for those on a super tight budget. It’s also based on an open source design, so it’s ripe for tinkering.
First off, one of the most appealing aspects of the USDX is its open-source design. For those who enjoy delving into the internals of their equipment and maybe even adding their personal touches, this is a goldmine. The fact that it’s open-source means you have the freedom to modify and improve upon the design, making it truly yours. In my case, I appreciated the inclusion of a front-end audio amplifier TDA1308, which allows for direct volume control via a knob. This might seem like a small detail, but trust me, having a physical knob for volume adjustment is a breath of fresh air compared to fiddling with menu-based settings. It’s more intuitive, tactile, and just plain convenient—especially when you’re in the heat of a QSO and need to make quick adjustments.
Power
Moving on to the power supply, the USDX transceiver employs a high-end LT1805 component for its 12V to 5V conversion. This is a significant upgrade from the common 7805 voltage regulators that plague many amateur radio devices. The LT1805 is known for its efficiency and reliability, ensuring that the rear circuitry doesn’t suffer from current deficiencies or overheating issues. As someone who’s had their share of equipment failures due to heat damage, this feature is a huge relief. It provides peace of mind knowing that your transceiver is equipped with a robust and reliable power conversion system that can handle the demands of regular use without compromising performance or longevity.
In terms of safety and durability, the use of the LT1805 for voltage conversion prevents the high heat damage that’s commonly associated with standard 7805 voltage regulators. This not only ensures safer operation but also contributes to the overall longevity of the transceiver. As ham radio operators, we invest considerable time and resources into our setups, and choosing equipment that prioritizes reliability and safety is paramount.
Audio
Speaking of audio, the integration of the TDA1308 audio amplifier enhances the overall user experience significantly. Not only does it provide clearer and more robust sound quality, but as mentioned earlier, it allows for direct volume control via a knob. This might seem like a minor feature, but in practice, it makes a world of difference. Menu-based volume adjustments can be cumbersome, especially during active communications, and having a physical control is infinitely more practical and efficient.
Technical Specifications
Now, let’s touch on the specifications. The USDX is rated for 13.8V/3A, with a power output of 3-5W and operates across a frequency range of 80m to 10m. It features automatic channel selection, is mono in terms of audio channels, supports multi-band operations. The amateur working bands covered include 80m, 60m, 40m, 30m, 20m, 15m, 12m and 10m — a solid range for various communication needs.
Another noteworthy aspect is the versatility of the antenna connector. The USDX is designed with a variable antenna mount, giving you the flexibility to install either an SMA socket or a BNC elbow socket. This adaptability is fantastic because it caters to different user preferences and connection needs. Whether you prefer the compactness of SMA connectors or the sturdiness of BNC connections, this transceiver has you covered. It’s these kinds of thoughtful design choices that make the USDX stand out in a sea of generic transceivers.
Conclusion
In conclusion, the USDX transceiver offers a compelling combination of open-source flexibility, superior power management, versatile antenna options, enhanced audio quality, and robust construction. For ham radio operators who value customization, reliability, and performance, this transceiver is definitely worth considering. Whether you’re a seasoned operator looking to upgrade your setup or a newcomer seeking a feature-rich device, the USDX has a lot to offer.
It’s worth noting that products can undergo updates and modifications, so it’s always a good idea to verify the current specifications and features directly from the manufacturer or seller.
Gallery
Video
Features
AGC / CAT / CW Decoder / DSP / Dual VFO / Noise Reduction / RF Attenuator / RIT / Signal Meter / Speaker / Split Operation / VOX
Transmitter
| Maximum RF output (watts): | 5 |
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Power
| Maximum operating voltage: | 13.8v |
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| Battery capacity (mAh): | 4000 |
Physical
| Width (mm): | 83 |
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| Height (mm): | 38 |
| Depth (mm): | 124 |
| Connectors: | BNC, PTT Out, CAT |
Meta
| Related radios: | uSOTA-ATU, |
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