Key benefits Cleaner reception and fewer spurs: R820T2 tuner plus a revised PCB layout and higherquality passive components reduce internal spurs and overall noise. Better stability under load: improved thermal design and enclosure prevent reception degradation at higher frequencies (notably above 1.2 GHz). Flexible HF capability: direct sampling mode covers 100 kHz–25 MHz for shortwave and other HF signals using the SMA port. What it solves Reduces USB and powerline interference through USBline noise suppression, ferrite powerline chokes, and additional bypass capacitors. Lowers the risk of ESD damage with upgraded ESD protection. Improves frontend matching to increase sensitivity and dynamic range for realworld signals. Main features Tuner: R820T2 Noise and interference handling: improved PCB design, noise breakout pads, additional bypass capacitors, ferrite powerline chokes, USBline noise reduction, improved ESD protection Cooling and enclosure: large aluminium case with passive cooling design (PCB cooling holes and aluminum enclosure). Units with cooling features that prevent reception failure due to heat above 1.2 GHz. HF direct sampling: listen to 100 kHz–25 MHz by connecting an HF antenna to the SMA port and selecting the Qbranch/directsampling mode. A builtin 25 MHz lowpass filter is included; external HF filters may be beneficial in strong MW/AM environments. Antenna connection: SMA female antenna port for broad compatibility with common antennas and adapters; lower insertion loss than less common ports. Compatibility and materials Physical: robust aluminium enclosure designed for thermal stability and shielding Connector: SMA female antenna port for wide adapter and antenna compatibility Electronic: R820T2based tuner and improved frontend components for more reliable SDR operation Practical applications / use scenarios Shortwave and HF listening: use direct sampling mode with an HF antenna on the SMA port to monitor 100 kHz–25 MHz broadcasts, beacons, and amateur HF signals. frequency monitoring where temperature matters: remote or continuous operation above 1.2 GHz benefits from the aluminium enclosure and coolingoriented PCB layout to avoid reception dropouts due to heat. Laboratory or experimental SDR setups: SMA port and improved noise/ESD protection make the unit suitable for testing, prototyping, and integration with a variety of antennas and adapters. Why choose this unit Combines the wellknown R820T2 tuner with hardwarelevel improvements (PCB, components, ESD protection, and powerline filtering) to deliver more stable, lowernoise SDR performance. Practical mechanical design (aluminium case and coolingfocused PCB) reduces thermalrelated performance issues in demanding environments. SMA female port provides broader accessory compatibility and typically lower insertion loss than less common dongle connectors. Note: The unit includes a builtin 25 MHz lowpass filter for directsampling HF use; strong mediumwave AM signals may still require additional HF filtering for results.