The SunSDR2 QRP is the HF and 6M transceiver with 5W output power and a wide range of capabilities. Thanks to the constantly improving ExpertSDR2 software and advantages of the direct sampling the SunSDR2 QRP can solve any given task for a reasonable price. The SunSDR2 QRP can be used either locally via the LAN interface or remotely using the Expert Remote system, it gives you flexibility in arranging your working place as never before.
Main features
Application field
Architecture description
Basic configuration:
Additional accessories:
RF ADC, bit @ MHz | 16 @ 122.88 |
ADC type | LTC2165 |
RX Frequency range, MHz | 0.1...55; 70...70.5 |
Undersampling, MHz | 0.1...500 |
Independent software receivers | 2 + 2 SubRX |
Sample rate, kHz @ bit | 48; 96; 192; 384 @ 24 768; 960 @ 16 (only RX1) |
Bandscope, MHz | 61 |
RX HF filters, MHz | LPF: 58 + 8 x BPF |
RX VHF filters, MHz | HPF: 68 + BPF for 4M |
BDR on HF, dB | 122 |
Sensitivity, uV | 0.1 |
DR IMD3, not less dB | 100 |
RMDR, dB | 107 |
ATT/Preamp, dB | -20; -10; 0; +10 |
RF DAC, bit @ MHz | 14 @ 122.88 |
TX Frequency range, M | All amateur bands 160-6 |
Output power on HF, W | 5 |
Output power on 6M, W | 5 |
TX IMD3, dB | 30 |
Local oscillator TCXO, MHz +/- ppm | 16 +/- 2.5 |
External 10 MHz oscillator input | + |
Built-in audio codec, bit | 24 |
RF input/output | 1 (Mini-UHF) |
PC interface | LAN 100 Mbit |
DC voltage range in RX/TX, V | 8...15 / 10...15 |
Recommended DC voltage, V | 12 |
Current consumption RX/TX, A | 0.3 / 3 |
Power consumption RX/TX, W | 3.6 / 36 |
Operating temperature, °C/°F | 0...+50/ +32...+122 |
Dimensions L x W x H, cm/inches | 18.5 x 10.6 x 4.5/ 6.5 x 3.94 x 1.38 |
Weight, kg/lbs | 0.8/ 1.8 |
Specifications are subject to change without notice or obligation and specifications are only guaranteed within the amateur radio bands.
Terms of the product's warranty
ExpertSDR2 User Manual v1.1
The new version of the User Manual for the SunSDR2 QRP transceiver - 20.11.2018
User Manual Addendum, by Erik EI4KF
Adenda del Manual del Usuario version 6.12 12-05-21
Setup instructions for WSJT-X, ExpertSDR2 and MacLoggerDX
ExtCtrl to SPE Expert PAs connection diagram
Using the transceiver for SO2V operation
Using the transceiver for SO2V operation with SDC
Both diagrams can be used for creating two working places with a single SunSDR2 QRP transceiver.
ExtCtrl to EB300 connection diagram
Warning! Software is device-specific! Don't mix software with unsuitable hardware, it may lead to issues that are not covered by warranty!
Warning! |
ExpertSDR2 tested on Ubuntu 20.04 x64.
![]() Published on 22-12-2020 Warning! |
Welcome to the new generation of SDR software – ExpertSDR3!
In 2021, we turned a new page in our history by launching the ExpertSDR3.
ExpertSDR3 software is being tested on the latest versions of Windows 10, Linux Ubuntu 22.04, and macOS 12 (with Intel CPU).
To report software bugs, please use this page.
ExpertSDR3 1.0.5 Beta
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ExpertSDR3 minimal system requirements:
Release Notes for alpha/beta versions of the ExpertSDR3 (link to a Google Drive folder)
Notas de la versión beta 1_0_0 de ExpertSDR3
Expert Remote System (ERS) reviewed by Werner Schnorrenberg (DC4KU) (July 2022)
English version / German version
Published in Funkamateur
Expert Remote System (ERS) reviewed by Werner Schnorrenberg (DC4KU) (July 2022)
English version / German version
Published in Funkamateur
Article by Marc Schijven, PE1FJN (October 2019)
ExpertRemote system reviewed by Werner Schnorrenberg (DC4KU) (November 2019)
Published in Funkamateur 3-2020