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

Features
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RTL-SDR Blog RTL SDR V4

  • 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
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SpecificationValue / Description
Tuner ChipRafael Micro R828D
ADC ChipRTL2832U
Frequency Range500 kHz – 1.7 GHz (including HF mode)
Maximum Bandwidth3.2 MHz (stable at 2.4 MHz)
ADC Resolution8-bit
Frequency Accuracy1 PPM TCXO
RF ConnectorSMA Female (F)
Bias-TeeSoftware-enabled, max 4.5 V
HF ReceptionBuilt-in upconverter with 28.8 MHz low-pass filter
EnclosureAluminum alloy, passive cooling
InterfaceUSB 2.0 (requires RTL-SDR Blog driver)
OS SupportWindows, Linux, macOS, Android
AccessoriesDipole antenna kit (2× telescopic antennas, 3 m extension cable, tripod, suction cup mount)

Use Cases
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  • 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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