The TORUN HF One, developed by Onirban Electronics & Engineering Ltd., brings a unique set of innovations to the world of compact, affordable uSDX radios. While uSDX radios have been praised for their portability, flexibility, and cost-effectiveness, the TORUN HF One takes these benefits a step further, introducing significant upgrades in performance, design, and user experience. Here’s an in-depth look at how TORUN HF One stands out from other uSDX options in the market.
1. Enhanced Power Output with Class-E Amplification
The TORUN HF One offers up to 70W PEP output, compared to the 5-10W output found in typical uSDX radios. This increase in power is due to TORUN’s efficient Class-E amplification, which not only boosts output but also minimizes power loss and heat generation. Class-E amplification in the TORUN HF One ensures greater range, better transmission quality, and efficiency unmatched by the standard linear amplifiers often found in other uSDX models.
2. Improved Audio Quality: Class D to Class A Conversion
A standout feature of the TORUN HF One is its audio quality. While many uSDX radios use Class-D audio circuits, TORUN takes it up a notch by converting Class-D to Class-A audio output. This enhancement provides crystal-clear audio transmission, reducing the distortion sometimes experienced with Class-D circuits. This meticulous attention to audio clarity ensures that users enjoy a high-quality listening experience, ideal for both casual use and contests.
3. Ready for Digital Modes with Plug-and-Play USB
One of the key improvements in the TORUN HF One is its straightforward digital mode setup. Unlike standard uSDX models, which often require multiple connections, the TORUN HF One integrates a built-in RS232 to USB converter. This feature allows easy plug-and-play digital mode operation, whether you’re using FT8, JS8, or any other digital mode. Users can now connect a single USB cable, reducing setup time and cable management complexity.
4. Advanced Digital Signal Processing (DSP) for Clearer Reception
TORUN HF One’s DSP capabilities go beyond typical uSDX implementations. The ATMEGA328P microcontroller at the core of the TORUN HF One powers a sophisticated 90-degree phase shifter, CW/SSB filters, and AGC—all implemented digitally. These features, combined with advanced DSP filters, reduce noise, handle strong signals, and ensure optimized reception in high-dynamic-range conditions, giving TORUN a performance advantage over traditional analog filter-based uSDX radios.
5. Efficient I/Q Handling and Direct Computer Interface
The TORUN HF One features an I/Q output through a 3.5mm audio socket, allowing users to capture I/Q data directly to their computer’s sound card. This connection provides greater flexibility in analyzing signals with tools such as FFT and expands the radio’s functionality. This feature, alongside CAT control, brings TORUN to the level of high-end SDR transceivers while maintaining the simplicity and affordability of uSDX models.
6. Upgradeable Firmware for Long-Term Innovation
The TORUN HF One’s firmware is designed with upgrades in mind. Users can easily update the firmware via the USB port, ensuring that they benefit from future improvements without needing to invest in new hardware. While some uSDX radios support firmware upgrades, TORUN HF One emphasizes ease of use, allowing for seamless updates that keep users on the cutting edge.
7. Customizable Power Output and Hackable PA Design
Onirban Electronics & Engineering Ltd. understands the value of customization, and the TORUN HF One offers various options for QRP Class-E MOSFETs. Additionally, the power amplifier (PA) board is hackable, supporting several low-cost MOSFETs and allowing users to experiment and modify the PA circuit to suit their needs. This level of customization is rarely found in other uSDX radios, making TORUN a versatile option for users who want a radio they can personalize and adapt.
8. SWR Protection and 4-Layer PA Board Design
Unlike many uSDX radios that can be prone to damage from impedance mismatches, the TORUN HF One’s PA board incorporates an SWR (standing wave ratio) sensor to prevent potential harm in cases of mismatch. Additionally, the PA is built with a robust 4-layer board and an auto-selectable low-pass filter, ensuring reliability and longevity even in challenging conditions. This protective feature provides peace of mind and reduces the need for additional protection circuits, which are often required in other uSDX setups.
9. Optimized Component Layout and Noise Reduction
Onirban Electronics & Engineering Ltd. has carefully designed the component layout of the TORUN HF One to minimize internal noise, which has been a common issue with uSDX radios. Through optimized layout in both the second prototype and the final production model, TORUN effectively reduces internal interference, delivering a cleaner signal that improves overall user experience.
In Summary: TORUN HF One Raises the Bar for uSDX Radios
While uSDX radios have always been praised for their compact and affordable design, TORUN HF One takes these features further by delivering higher power output, superior audio clarity, advanced digital compatibility, and a hackable, customizable setup. By addressing limitations commonly found in uSDX radios, TORUN HF One offers a powerful and efficient radio communication experience that is perfect for both casual operators and serious enthusiasts alike.
Learn more about the TORUN HF One and how it’s redefining affordable SDR radio technology at TORUN or visit our website at Onirban Electronics & Engineering Ltd..
