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

(5 customer reviews)

In stock (can be backordered)

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.

SunSDR2 DX Brochure

Eham reviews

3,021.29 $

  • EUR: 2,790.00 €
  • SEK: 32 450 kr

In stock (can be backordered)

unlimited available through backorder

SunSDR2 DX is the most popular transceiver from Expert Electronics. It is a high performance 100W-HF; 80W-6M; 8W-2M transceiver, very compact, and active cooling making it perfectly suited for DXpeditions and contest operators.

The latest hardware update, SunSDR2 Gen5!*

  • Redesigned heatsink, with thinner and more frequent gills for higher effectiveness
  • Improved temperature sensor placement for more accurate temperature readings
  • Improved TX IMD3 up to ~37 dB across all HF bands, with 100W output power
  • 6M output power have been increased up to 80W
  • Improved SDR PCB protection from cross-talks. Improved protection for the supply chain
  • Added ferrite bead on the flex-cable connecting PA and SDR PCBs, for more stable operation with external ATU
  • Added filtering of the headphones’ connector
  • Slight improvement of the RX path
  • TX filter of the DAC chip, which provides better linearity of the TX signal
  • Band pass filter on the PA input, which improves linearity of PA operation
  • Improved structure of 160, 6M TX filters
  • RX/TX switching node on PCB is more resilient now

* Improvements in comparison to Generation 1 (November 2019)

SunSDR2 DX Features 

  • 100 watt transmit power on HF, 80 watt on 50 MHz!
  • TU connector for AAT-100 automatic antenna tuner option
  • Powerful fan for demanding use
  • 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
  • VHF LNA (PGA103+ chip)
  • High-performance built-in stereo audio codec 24 bit with 114 dB dynamic range
  • Anderson Powerpole power connector
  • Ground lug
  • Sturdy DIP-type ExtCtrl connector
  • Low power consumption and great 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*
  • Transverter support
  • 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)
  • 10 MHz externa reference oscillator input
  • 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

* ** Feature supported by the transceiver’s hardware and will be supported in a future release of ExpertSDR3 software.

SunSDR2 DX Architecture

ExpertSDR3 – a Whole New User Experience!

The new version of ExpertSDR3 make the SunSDR2 DX a whole new beast. This popular application has been rewritten from the ground up and version 3 sports a much cleaner and more versatile GUI, Graphic User Interface. It’s cloud service lets you log in without setting up port forwarding and firewall rules, it just works! ExpertSDR3 connects directly to any EE device locally or via remote (via internet) for a seamless user experience. Paired with the new E-Coder 2 the you will enjoy latency-free SSB and CW monitor listening.

ExpertSDR3 System Requirements

  • ОS Windows 10 x64 or later versions, Linux Ubuntu 22.04 x64 and the latest patches of versions 11 (BigSur)/ 12 (Monterey)/ 13 (Ventura) of macOS (Intel and Silicon)
  • 4 core CPU Intel Core i3 or Core i5
  • 8 GB RAM
  • Video card with support of DirectX11 or 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 Up to 80
Output power on VHF, W 7 (up to 8)
TX IMD3 HF / VHF, dB 37 / 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

SunSDR2 DX is made to the highest quality standards in Taiwan (TW)!

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Based on 5 reviews

5.0 overall

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  1. Guest (verified owner)

    At the beginning of February I bought a SunsdrDX. The transaction was easy and quick.
    The device is very compact and fits in every chack. The connection to my home network was easy and now I can use the software on my laptop and Surface Windows tablet without any problems.
    I use the software ESDR2 or ESDR3 and it works smoothly with both versions, version 3 is an alpha version and is not yet finished, so there is still a lot missing that can be used in V2.
    I already had 2 SDR tranceivers, Flex 3000 and Flex 6300. For me, the SunSDR2DX is by far the better tranceiver.


  2. Thomas Rossel DG1PY (verified owner)

    SunSDR2DX – is this a realy radio?

    In the first days of SDR i wouldn´t have an SDR. Because its not a really radio with scales and knobs.
    At our contest group i learn to know the advantages of a Panadapter in combination with a “radio”.

    Now i am sitting in front of the SUNSDR2 DX, has the overview of a complete HAM-Band, have unbelievable filters, notches, capabilities,
    uncountable functions in combination with the computer, have found a few new DXes.
    The conclusion is: Its a really radio.
    I don´t miss the boxes with scales and knobs……
    Thomas DG1PY
    Buy it by PileupDX for a good customer service!

    Thomas Rossel DG1PY

  3. Erik SM0JCA

    I have tried several radios such as Flexradio 6600, Elekraft K3, SunSDR2 Pro and more. The SunSDR DX has a definite fun factor and the challenge with additional software applications and Software Defined Connectors app with TCI appeals to my aging brain. CW and SSB operation runs stable and with excellent reports. With 100W output this radio is a bit more flexible in operation and the improvements makes it a great radio.

    Erik SM0JCA

  4. Palle

    Just as my SunsdrPRO 2, a GREAT radio, with a lot of possibilities. Looking forward to use it on my remote location, with the AAT-100.
    A whole new way of doing Ham Radio.

    Love it.


  5. Tilman, SM0JZT

    Great value for money radio. Does not look like a normal radio of course, and you have to get used to the “software interface” on a PC.
    Fantastic for “remote control”.
    Great improvement in RX but also great to have the big termostatical controlled fan on top.
    Looking forward to revised software architecture.

    Tilman, SM0JZT

    Tilman, SM0JZT