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OpenSourceSDRLab RTL-SDR Blog V4 — Entry-Level SDR Receiver
Features#

- Upgraded R828D tuner delivers lower noise and better sensitivity compared to the previous R820T/R860
- Built-in upconverter enables HF reception down to 500 kHz (standard RTL-SDR dongles bottom out at 24 MHz)
- 1 PPM Temperature-Compensated Crystal Oscillator (TCXO) for significantly improved frequency stability
- Software-controlled Bias-Tee powers external LNAs or active antennas
- Triple-notch frontend filter effectively suppresses broadcast FM/AM/DAB interference
- Redesigned low-noise PCB with enhanced ESD protection and passive-cooling aluminum enclosure
- Bundled multipurpose dipole antenna kit — ready to use right out of the box
Specifications#
| Specification | Value / Description |
|---|---|
| Tuner Chip | Rafael Micro R828D |
| ADC Chip | RTL2832U |
| Frequency Range | 500 kHz – 1.7 GHz (including HF mode) |
| Maximum Bandwidth | 3.2 MHz (stable at 2.4 MHz) |
| ADC Resolution | 8-bit |
| Frequency Accuracy | 1 PPM TCXO |
| RF Connector | SMA Female (F) |
| Bias-Tee | Software-enabled, max 4.5 V |
| HF Reception | Built-in upconverter with 28.8 MHz low-pass filter |
| Enclosure | Aluminum alloy, passive cooling |
| Interface | USB 2.0 (requires RTL-SDR Blog driver) |
| OS Support | Windows, Linux, macOS, Android |
| Accessories | Dipole antenna kit (2× telescopic antennas, 3 m extension cable, tripod, suction cup mount) |
Use Cases#
- ADS-B aircraft tracking
- Maritime AIS vessel monitoring
- NOAA / Meteor M2 weather satellite image reception
- Amateur radio (HF/VHF/UHF receive)
- Radio astronomy (hydrogen line observation)
- P25 and MotoTRBO digital voice decoding
- APRS and ACARS packet tracking
- DAB digital radio reception
- RF spectrum monitoring and security research
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