SunSDR2 QRP 5 Watt HF & 6m Transceiver

SunSDR2 QRP 5 watt SDR transceiver will impress you! This small HF and 6 meter transceiver uses DUC/DDC technology to produce top range performance. Direct signal sampling provides clear RX audio and puts a clean signal on the air. Explore the future of ham radio, the SunSDR2 QRP is the perfect way to get started with SDR, Software Defined Radio!


The SunSDR2 QRP is a modern HF transceiver with 5W output power and a wide range of capabilities. Thanks to the powerful ExpertSDR2 software and the advantages of the direct sampling SunSDR2 QRP provides high performance at a reasonable price. It can be used either locally via LAN or remotely using ExpertRemote.

Remote Control

The SunSDR2 QRP can be controlled via Internet using Expert Remote,  a client-server system that allows you to place the transceiver and server in a remote quiet location with good antennas and operate from any place where internet is available. Just connect your SunSDR2 QRP to the Pileup RPI server, provide the server with an 4G or DSL internet connection and you are ready to remotely access your SunSDR2 QRP from anywhere.

SunSDR2 QRP Features

  • HF to 6 meter general coverage receiver
  • Direct Down Conversion receiver path (DDC) with 16 bit ADC
  • Dual receivers, each with a sub receiver (4 slices)
  • Sample rates 48-384 kHz (2 RX), 768 or 960 kHz (1 RX)
  • Wide range band scope, up to 60MHz
  • 4 meter RX in Nyquist zone
  • Sunsdr2 qrp have 5 Watt transmit on all ham bands
  • Direct Up Conversion transmission path (DUC)
  • Embedded power and SWR meters
  • Electret microphone input or Yaesu MH-31 compatible
  • Headphones output
  • PTT footswitch input
  • CW-keyer input
  • Accessories connector with 8 open collector switches for control of external power amplifier, antenna switch, bandpass filters, etc.
  • Reverse polarity protection
  • Ethernet LAN interface
  • Remote control via Internet using free software

PC Requirements

  • CPU Intel Core i3 or higher
  • 2 GB RAM (4 GB recommended)
  • Video card with 256 Mbyte RAM and OpenGL 1.5 support
  • Local network connector 100 Mbps or 1 Gbps
  • OS Windows XP/7/8/10 x32 or x64, OS Linux Ubuntu x64

Block Diagram

SunSDR2 QRP Block Diagram

SunSDR2 QRP Specifications

General coverage receiver 0.1 to 55 MHz
Frequency coverage TX All amateur frequencies
Sensitivity 0,1 uV
Ma transmitter output power in HF 5 W
BDR, Blocking dynamic range (HF) 115 dB
RF ADC resolution 16 bit
RF ADC and DAC clock frequency 122.88 MHz
Local oscillator’s stability +/- 2.5 ppm
Supply voltage range 10 to 15 Volt
Maximum consumption current 3A
Built-in audio codec resolution 24 bit
Operating temperature 0 to +75C
Dimensions 165х100х35 mm
Weight 0,5 kg


Weight 1.5 kg

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