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SunSDR2 DX is a direct sampling 100 watt SDR transceiver developed for the serious DX:er and contest operator. It covers all HF bands plus 50 MHz and 144 MHz VHF bands with a general coverage receiver. It combines high performance and 100 watt transmit power in a small package with a LAN interface for maximum flexibility. Remote control over DSL or mobile 3G or 4G connections provide a full SDR experience using the Expert Remote System.

The SunSDR2 DX transceiver based on the well-known SunSDR2 PRO transceiver and features several hardware improvements. It is a 100W-HF; 50W-6M; 8W-2M transceiver, very compact, has a separate connector for active cooling and improved supply system, meaning it’s perfectly suited for DXpeditions and contest operators. Also, we’ve added a separate connector for an external ATU, thus SunSDR2 DX has all the functionality you got used to in our radios and even more. Improved hardware along with the ExpertSDR2 software makes this high-performance SDR transceiver the perfect base station. The evident choice for a true contester!

SunSDR2 DX Improvements

100 watt transmit power on HF, 50 watt on 50 MHz!

New ATU connector for future antenna tuner option

External Fan connector 

External fan included

HPF for VHF (100 MHz) to eliminate strong out-of-band stations coming from HF

LPF for HF (70 MHz) to eliminate strong out-of-band stations coming from VHF

Improved VHF LNA (PGA103+ chip)

New high-performance built-in stereo audio codec 24 bit with 114 dB dynamic range

Anderson Powerpole power connector

Ground connector added

Sturdy DIP-type ExtCtrl connector

Improved PCB topology

Lower power consumption and improved power dissipation

SunSDR2 DX Main Capabilities

Independent RX path based on DDC (Direct Down-Conversion) architecture

Independent TX path based on DUC (Direct Up-Conversion) architecture

Output power: 100W on HF, 50W on 6M and 8W on 2M

2 software RXs + SubRX for each of them (4 slices total) + independent wideband Bandscope up to 80 MHz

Remote control operation, using it, you connect PTT and CW-key to the E-Coder panel. Microphone and E-Coder are connected to the remotely set up PC

TCI interface for seamless connection with third-party software like SDC (with its own Skimmer), LogHX, SWISSLOG and RUMlog, more are coming

Professional TX processing module provides the most advanced tuning capability for voice operation

ExtCTRL connector to control external devices with 8 powerful keys with open collector

ALC connector for external power amplifiers*

Supports use of VHF transverters**

An opportunity to use the transceiver as a signal generator via DAC OUT connector (SMA connector)

An opportunity to use external filters in the middle of the RF path, using ADC IN and RX OUT (SMA connector)

Minimal delay in CW mode (about 10 ms)

Input for external 10 MHz reference oscillator

An opportunity to use the transceiver in SO2V mode

Full duplex or half duplex modes***

Antenna switch with 2 HF antenna connectors and separate VHF antenna connector (Mini UHF connectors)

Internal power-meter for HF and VHF bands and SWR-meter for HF band

Ethernet LAN interface provides a fast and reliable connection to PC

* ** *** These functions are supported by the transceiver’s hardware, but is not implemented in the ExpertSDR2 software. They will be supported in the future ExpertSDR2 software releases.

ExpertSDR2 Software

The ExpertSDR2software package is used to control the SDR transceiver. In receiving mode the software provides two independent receiving channels with up to 312 kHz bandwidth. Each receiver has its own sub receiver. ExpertSDR2 runs under Windows XP/7/8/10 x32 or x64, Linux Ubuntu x64 and MacOS (MacOS currently beta). Minimum hardware requirement Intel Core i3 1.6GHz or higher, video card supporting OpenGL 1.5 and RAM 256 MB or more.

ExpertSDR2 System Requirements

2 or 4 core CPU Intel Core i3 or Core i5;


40 GB free space on the HDD/SSD for the ExpertSDR2 and accompanied programs;

17′ or bigger monitor;

video card with OpenGL 1.5 or higher;

ExpertSDR2 supports Windows 7-10 32/64 bit, Linux (Ubuntu/Kubuntu 18.04 x64), and macOS 10.14 Mojave and higher.

SunSDR2 DX Specifications


RF ADC, bit @ MHz 16 @ 160

ADC type LTC2209

RX Frequency range, MHz 0.1…65; 95…155

Independent software receivers 2 + 2 SubRX

Sample rate, kHz @ bit 39; 78; 156; 312 @ 24

Bandscope, MHz 80

RX HF filters, MHz LPF: 65 or 9 x BPF + constant LPF: 70

RX VHF filters, MHz WideRX: 95-155 or SAW filter for 2M: 144-148 + constant HPF: 100

BDR on HF, dB 130

BDR on VHF, dB 129

Sensitivity, uV 0.2

ATT/Preamp, dB -20; -10; 0; +10

VHF LNA, dB 27

Band Pass Filters 9 x HF octave band pass filters:

160M: 0-2.5 MHz (Chebyshev I – 7 Order)

80M: 2.5-4 MHz (Chebyshev I – 3 Order)

60M: 4-6 MHz (Chebyshev I – 3 Order)

40M: 6-7.3 MHz (Chebyshev I – 3 Order)

30M: 7.3-12 MHz (Chebyshev I – 3 Order)

20M: 12-14.5 MHz (Chebyshev I – 3 Order)

17-15M: 14.5-21.5 MHz (Chebyshev I – 3 Order)

12-10M: 21.5-30 MHz (Chebyshev I – 3 Order)

6M: 30-65 MHz (Chebyshev I – 3 Order)

Wide filters for entire Nyquist zones 0-65 MHz and 95-155 MHz

RF DAC, bit @ MHz 14 @ 640

TX Frequency range, M All amateur bands 160m to 6m and  2m

Output power on HF, W 100

Output power on 6M, W 50 (up to 60)

Output power on VHF, W 7 (up to 8)

TX IMD3 HF / VHF, dB 35 / 30

TX Filters 8 x LPF:

160M: (Eleptic – 5 order)

80M: (Eleptic – 5 order)

60-40M: (Eleptic – 5 order)

30-20M: (Eleptic – 5 order)

17-15M: (Eleptic – 5 order)

12-10M: (Eleptic – 5 order)

6M: (Eleptic – 5 order)

2M: (Eleptic – 5 order)

Local oscillator TCXO, MHz +/- ppm 20 +/- 0.5

External 10 MHz oscillator input +

Built-in audio codec, bit 24

RF input/output 2HF, 1VHF (Mini_UHF)


PC interface LAN 100 Mbit

DC voltage range in RX/TX, V 8 – 14.8 / 10 – 14.8

Recommended DC voltage, V 13.8

Current consumption RX/TX, A 1.2 / 24

Power consumption RX/TX, W 16.5 / 330

Operating temperature, °C/°F 0 to +50 / +32 to +122

Dimensions L x W x H, cm/inches 19.0 x 17.0 x 8.0/ 7.48 x 6.69 x 3.14

Weight, kg/lbs 1.8/ 3.96

Specifications are subject to change without notice or obligation and specifications are only guaranteed within the amateur radio bands.


Whats in the Box

SunSDR2 DX Transceiver with cooling fan

LAN-cable 1.8m for connecting to local network

Power cable 2.0m for connecting to power supply

Two 6.3mm phono male to 3.5mm phono female adapters to connect a headset to the radio

Mini UHF (male) to SO239 (UHF/PL female) pigtail adapter with 30 cm  RG58 coax.

SunSDR2 DX Recommended Accessories

Noise cancelling headphones and ModMic boom microphone

E-Coder control panel for ergonomic contest or DX operation

E-Coder Plus control panel with higher resolution VFO encoder

E-Coder PRO control panel with sound card for local monitor of remote radio

Pileup RPI Server for remote control over WAN/Internet

UHF to Mini-UHF adapter

UHF to Mini-UHF pigtail adapter

PTT control cable for external power amplifier

PTT & Band Data cable for SPE Expert amplifiers

Anderson Powerpole Power plug kit

Power Supply 13.8 Volt, 23A

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SunSDR2 DX 100W HF, 6m & 2m Transceiver

  • Brand: Expert Electronics
  • Product Code: SunSDR2 DX 100W HF, 6m & 2m Transceiver
  • Availability: In Stock
  • €2,399.00
  • €2,125.00

  • Ex Tax: €1,756.20

Tags: SunSDR2 DX 100W HF, 6m & 2m Transceiver