SunSDR2 QRP SDR Transceiver Electronics extends their portfolio with a QRP SDR transceiver with 5W output power. The SunSDR2-QRP is a compact allmode transceiver which uses up-to-date digital components. A 16 bit analog digital converter (ADC) is clocked with 122.8 MHz sample rate and achieves a very good blocking dynamic range (BDR) of 115 dB. The excellent sensitivity and large signal handling capability is accomplished by using 9 analog bandpass filters in front of the ADC. The displayed spectrum width can be selected from 48 to 960 kHz. Up to a spectrum width of 384 kHz two simultaneous receivers are possible, above that only one. Additionally a 60 MHz panorama display is available.

In contrast to the already known SunSDR2-Pro transceiver the manufacturer has selected a smaller enclosure for the QRP transceiver, resulting in fewer antenna connetions. The audio output for headphones was maintained, just like on the larger radio. The audio signal for this output is created directly in the transceiver with an own 24 bit digital analog converter. The result is latency free high quality audio. Since the SunSDR2-QRP also offers a microphone connection right on the transceiver, there is no need to use the internal soundcard of the computer at all. Of course a headset conected to the computer can be used as well. One microphone connector (of two) on the radio is compatible with the Yaesu MH-31A8J microphone.

The connection to the computer is done via Ethernet cable. This is the better solution for high-end SDRs enyway, due to it's simplicity and higher speed than USB. A network infrastructure (Switch or Router) is not required, the transceiver can be linked with the supplied Ethernet cable directly to the computer. The morse key and a PTT is also directly connected to the radio, this simplifies set up very much. Additionally a 10 MHz reference clock input is available for very high precision frequency accuracy.

The SunSDR2-QRP transceiver can be easily remotely operated over a computer network by using the freely available ExpertRemote software. When a computer is available at the remote location (a Raspberry-Pi is sufficient), remote control over the internet is equally possible. For daily operation the supplied ExpertSDR2 software is used. This program offer rich functionality while maintaining a good ease of use. The QRP transceiver supports 8 open collector outputs which can be freely switched on and off, for example to switch antennas or a power amplifier. in all the SunSDR2-QRP offers an convincing price/performance ratio, regardless if you are looking for a compact portable transceiver or to start an affordable remote operated ham radio station.

Technical Data SunSDR2-QRP
Frequency Range RX HF 10 kHz - 55 MHz
Frequency Range TX HF All amateur bands incl. 6m
RX sensitvity 0.1 µV
Max. Power (output) HF 5 Watt
Blocking Dynamic Range HF (typ) 115 dB
Bandpass-Filter HF 9
ADC Sample rate 122.8 MHz
ADC resolution 16 Bit
DAC clock frequency 122.8 MHz
DAC resolution 14 Bit
LO precision [1] ± 2.5 ppm
Bandscope width max. 60 MHz
Spectrum Width 48, 192, 384, 768, 920 kHz
Independant receivers (when using up to 384 kHz width) 2
Attenuator -31.5 – 0
Preamplifier +10dB
Antenna connection HF 1x Mini-UHF
Network connector RJ-45, 100MBit/s Ethernet
Mikrophone Impedance (dyn.) 600 Ω, Yaesu MH-31 compatible
Supply Voltage [2] 10 - 15 V
Max. current 3 A
Dimensions 165 x 100 x 35 mm
Weight 0.1 kg
Temperature range (operating) 0 – 75°C
Order No.
SUNSDR2-QRP SunSDR2-QRP SDR Transceiver, 5W 1339.00
42710 Adaptor Mini-UHF plug / PL socket 6.90


SunSDR2-PRO SDR Transceiver

Modern SDR transceiver for shortwave, 6m and 2m VHF with excellent receiver performance. Suitable for all modes incl. CW, SSB (USB, LSB), FM, AM and digital modes. With wide band receiverfrom 9kHz to 65 and 96 to 148 MHz. The SunSDR2-Pro is a refined successor to the SunSDR2 transceiver. This evolutionary step picks up experiences collected with daily use of the first series, it offers an even better AD converter, some connectors have been modified, a better local oscillator is used and the software was improved in many points. The result is a modern and future-proof transceiver concept for the demanding ham radio operator. The receiver of the SunSDR2-Pro is based on the fast 16 bit ADC LTC2293, which operates at 160 MS/s. This is the basis for an excellent blocking dynamic range (BDR) on HF of up to 130 dB. With the further addition of 9 bandpass filters for HF and one narrow filter dedicated for VHF the result is a receiver with very good sensitivity, a wide dynamic range and strong resilience against strong signal blocking. When used with the ExpertSDR software, two independent receivers are available, the receive window can be up to 312 kHz wide. Additionally a large bandscope of up to 80 MHz width is available. The transmitter is designed as an independant unit with it's own quadrature oscillators, allowing flexible semi or full duplex operation. This enables the SunSDR2-Pro with a suitable software to be used as a measurement ransmitter and spectrum analyser. Independant amplifiers for HF and VHF produce 20 or respectively 10 Watts transmit power. For HF two switchable antenna connectors are provided, and VHF has a separate connector. Other connectors are provided for transverter operation or use of a power amplifier. Eight freely programmable switching outputs can be used to drive antenna switches, external bandfilters, pre-amplifiers or sequencers. Another highlight of the SDR transceiver is that the CW keying signals are processed directly by the processor and FPGA of the radio. This ensures that there is no discernible delay when using telegraphy, even QSK with higher speeds is possible. The microphone is also connected directly to the device, two different connectors are provided. One, an RJ-45 socket is compatible with a Yaesu MH-31 dynamic microphone, the other is a 3.5mm phone socket, for example for a mic of a head set.

The decoded audio signal as well as the transmit audio is also available in the digital data stream over the network interface. This enables a flexible layiout either locally in the shack or with remote operation over a local network. The SunSDR2-Pro is connected by an RJ-45 100MBit/s Ethernet connector. Smart programming of the interface enables the connection of the transceiver either directly to a computer, or via a switch or router integrated into the home network. This offers an easy solution for remote operations of the radio. The audio is available over the network interface as well, allowing "armchair" operation, for example with a simple computer headset. The freely available ExpertSDR software is under continous development, and will be available free for owners of the SunSDR2-Pro transceiver in the future. Supported operating systems are Win XP, Win 7 and Win 8. Support for MacOS and Linux is planned. The ExpertSDR software is easy to use despite all the complexity of an SDR transceiver. The software provides interfaces (CAT, virtual audio) for other programs, for example contest loggers or multmode programs. In some cases a so called Virtual Audio Cable (VAC) might be required (not provided). All told the SunSDR2-Pro is a versatile transceiver, designed for shortwave as well as VHF and equipped with an excellent receiver, which will appeal to many radio amateurs and professionals alike. With it#s compact size (just 165 x 165 x 30mm) and a weight of only 1kg the transceiver cannot only be used at home in the shack, but also when portable or in a vacation (power requirements12 t o16VDC, 5A max.).


Technical Data SunSDR2-Pro
Frequency range RX HF 9 kHz - 65 MHz
Frequency range RX VHF 96 - 148 MHz
Frequency range TX HF Alle Amateurfunkbänder inkl. 6m
Frequency range RX VHF 144 - 148 MHz
RX Sensitivity 0.7 µV
Max. transmit power HF 20 Watt
Max. transmit power VHF 10 Watt
Blocking Dynamic Range HF (typ) 128 - 130 dB
Blocking Dynamic Range VHF (typ) > 114 dB
Bandpass filter HF 9
Bandpass filter VHF 1
AD converter clock frequency 160 MHz
AD converter resolution 16 Bit
DA converter clock frequency 640 MHz
DA converter resolution 14 Bit
Oszillator stability [1] ± 0.5 ppm
Bandscope width 20 kHz - 80 MHz
Receive window size (waterfall) 39, 78, 156, 312 kHz
Independant receivers 2
Attenuators 0, -10, -20 dB
Pre-amplifier +10dB
ALC voltage 0 - 4 V
Antenna connectors HF 2x Mini-UHF
Antenna connectors VHF 1x Mini-UHF
Network connector RJ-45, 100MBit/s Ethernet
Mikrophone impedance (dyn.) 600 Ω, Yaesu MH-31 compatible
Supply voltage 12 - 16 V
Max. current consumption 5 A
Dimensions 165 x 165 x 35 mm
Weight 1 kg
Temperature range (operating) 0 - 70°C

[1] without external 10MHz reference clock
[2] Connector "1-770968-0" by TE Connectivity

Special Offer SunSDR2-Pro

Expert Electronics SunSDR2-pro instead of 2195,00 now only 1995,00! You save 200.00.

Download: SunSDR2-Pro Getting Started Manual (PDF, English, 3.4MB)
Download: SunSDR2-Pro Operating Manual German (PDF, German, 7.8MB)

Order No.
SUNSDR2-PRO HSunSDR2-Pro HF/6m/2m SDR Transceiver 1995.00

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