The Elad FDM-S2 is the latest software defined radio receiver from the Italian manufacturer, Elad. The FDM-S2 is a direct sampling receiver based on 122.88MHz, 16bit single channel ADC converter covering HF 6m and offering the possibility to exploit the FM broadcast band and VHF Band (135-160)MHz.

Click here to read a full review of the Elad FDM-S2.

Features/Specifications:

• Frequency range:
  • HF: 9kHz-52MHz MDS: -132dBm @14MHz, Clipping lev -8dBm
  • FM: 74-108MHz sensitivity
  • VHF: 135-160MHz MDS -137dBm @145MHz, Clipping level -19dBm
• Separate antenna inputs for HF/6m and FM/VHF/Bypass ranges
• Max. DDC Bw 6144kHz (Aliasing free viewable bandwidth up to 5 Megahertz) currently available selectable bitstreams:
  • 192ksps-32bit,
  • 384ksps-32bit,
  • 768ksps-32bit,
  • 1536ksps-32bit,
  • 3072ksps-32bit,
  • 6144ksps-16bit
• Special double DDC mode of 2 x 384kHz bandwidth to be placed within one of the input ranges.
• 4 virtual receivers freely tunable within DDC window
• Each virtual receiver holds settings for mode,bandwidth,volume,squelch and audio output routing.
• Patent pending Triple Tuning Bar for coarse and fine spectrum navigation
• Modes:
  • CWU,
  • CWL,
  • USB,
  • LSB,
  • AM,
  • SAM,
  • FM,
  • WFM,
  • DSB,
  • RTTY,
  • DRM,
  • RDS
• Interference rejection: Noise Blanker, Adaptive Noise Reduction and auto notch, special 2 manual notches (directly placed in DDC spectrum)
• Integrated DRM decoding, text and station schedule update.
• Integrated WFM Stereo with RDS decoding.
• Universal CAT control and OmniRig(tm) integration
• Customizable IF panadapter facilities for integration with existing transceiver/receivers
• User definable bandplan, specified settings per frequency range.
• XML based memory management
• DX cluster data integration and EIBI database import
• Plotting of memory, database and cluster information directly on spectrum screen
• Proprietary Ext IO bus for accessory equipment, also offering 8 DC lines for universal switching (*via SFE1.0 board)
• Supported by 3rd party software: SDR-RadioV2 , Winrad, HDSDR, Studio 1
• DDC Spectrum recorder with automated times chedule control
• Separate IF/AF spectrum windows for detailed signal analysis
• Easy, fully informative User Interface with deep customization
• Resizable windows and multi-monitor support
• Wideband secondary Audio/IF outputs for decoder software (eg CW Skimmer, WeatherFax)
• Full integration of the Tmate(tm) series controllers
• Compact size 110 (W) x 90 (D) x 40 (H) mm and 360g, come with 2 BNC to SMA adapters, USB cable, USB double cable adapter, CD and safe bag.

Resources

Reviews:

• The SWLing Post review of the FDM-S2

Retailers:

• Elad USA

The Enablia TitanSDR is a multi-channel HF receiver with parallel demodulation, recording and analysis of up to 40 simultaneous HF simultaneous emissions.

According to Enablia, the TitanSDR is designed for homeland security and foreign intelligence (SIGINT and COMINT), military communications, environmental protection (from electromagnetic pollution), detection of interfering or illegal electromagnetic emissions (by national radio frequency agencies) and general purpose spectrum analysis.

Of course, the TitanSDR is a capable, multi-channel receiver for the discerning DXer.

The following instructional video shows how the TitanSDR application is configured and used.

Click here to download the TitanSDR data sheet.

Note: A review of the TitanSDR will be published in The Spectrum Monitor magazine and, later, on the SWLing Post.

Key features:

• Direct conversion Front-End architecture
• 9 kHz to 32 MHz frequency coverage
• 16 frequency preselectors
• High front-end linearity
• One to four parallel Wideband channels (312.5 KHz to 2.1875 MHz wide)
• Up to 40 parallel Narrowband channels
• Modes: SSB, AM, NBFM, CW, eSSB, FSK, DRM
• High frequency resolution Panoramic Spectrum (305 Hz RBW)
• Wideband and Narrowband spectrum and waterfall (with custom palette)
• Record-and-replay of Wideband channels
• Scheduler of recording activities
• Tight integration with Krypto500 decoder by Comint Consulting
• Support for Code300-32 decoder by Hoka Electronic

Resources:

Enablia Electronics and Communications

The SDRplay RSP is a wideband full-featured SDR which covers all frequencies from 100KHz up to 2 GHz. At time of posting, the RSP is one of the most affordable, full-featured, SDRs on the market.  The RSP allows for monitoring and recording up to 8MHz of spectrum at a time. An open API allows developers to create new demodulators or applications around the platform.

We gave the RSP a very favorable review on the SWLing Post.

Key features:

• Robust and strong plastic case
• Continuous coverage from 100KHz to 2 GHz
• 12-bit ADC silicon technology (not another 8 bit dongle!)
• Built-in High-Performance front-end filters
• Up to 8 MHz bandwidth
• Good sensitivity and selectivity
• Low noise floor
• Simple USB interface (type B socket)
• SMA antenna socket
• Powers over the USB cable

General

• Weight: 110g
• Size: 95mm x 80mm x 30mm

Connectivity

• Single RF connector (SMA)
• USB 2.0 (high speed) type B socket

Frequency Range

• Continuous coverage 100kHz – 2GHz

ADC Characteristics

• Sample frequency 2MSPS – 10.66MSPS
• 12 bit native ADC
• 10.4 ENOB
• 60dB SNR
• 67dB SFDR

Resources

Reviews:

• The SWLing Post review of the SDRplay RSP
• Comparison of the Airspy and SDRplay RSP
• Eham
• SDRplay list of reviews

Retailers:

• SDRplay
• Ham Radio Outlet

The RFspace SDR-IP software defined receiver

The SDR-IP is an internet protocol (TCP/IP), high-performance, software defined receiver with 1.8 MHz bandwidth. It offers versatility for scientific research, radio astronomy, shortwave listening and amateur radio.

Specs:

• Frequency Range: 0.01 – 34 MHz *
• Digital Down Converter: Xilinx FPGA
• Synchronization : Phase and Frequency (Opt. 01-02)
• PC Interface: Ethernet 100 base-T (UDP/TCP/IP)
• Filters: 120+ dB 90% Alias Free BW
• Decimation Rate: Variable 40-2560 (in 10 increment)
• Output Sample Rate: 32 KHz to 2.0 MHz @ 24b IQ
• DDC Flatness: <0.1 dB
• Dynamic Range: 105+ dB
• MDS Preamp Off (500Hz): -129dBm 1.8 – 30 MHz
• MDS Preamp On (500Hz): -130dBm 1.8 – 30 MHz Analog to Digital Converter: 16bit w/ Dither
• Digital to Analog Converter: 14bit @ 200 MHz
• Preselection: 10 Filters
• Attenuators: 0, -10dB, -20dB, -30dB
• Sample Rate: 80.000 MHz
• Memory: 65536 x 16 bit samples (256K x 16 option)
• External Radio Control: Built-in RS-232 port
• Dimensions: 210 x 70 x 180 mm
• Display: 16 x 2 Character LED LCD
• Power: 5 Volts DC @ 1.5 Amp **
• Connections: 4 x BNC (RF In, Ext Ref, Trigger, IF Out) , RS-232, Pulse Out, Ethernet, Power
• Compliance: CE, FCC, IC

Resources:

• Manufacturer’s Product Page – RFspace SDR-IP
• Reviews:
  • Video (comparison with Perseus)
• Retailers:
  • RFspace
  • Universal Radio

The RFspace NetSDR software defined wideband receiver

The NetSDR radio is a high performance networked SDR with 1.6 MHz bandwidth. The NetSDR uses a high performance 80 MHz, 16 bit ADC with both dithering and randomization for best performance. The output I/Q bandwidth is configurable via software. PC communications are handled over a 100 base-T port using 24 or 16 bit I/Q words.

The NetSDR is a complete plug and play solution. There is no need for additional preamplifiers, preselectors or code development.

Specs:

• Frequency Range: 0.01 – 34 MHz *
• Digital Down Converter: Xilinx FPGA
• Synchronization : Optional Frequency Only
• PC Interface: Ethernet 100 base-T (UDP/TCP/IP)
• Filters: 115+ dB 80% Alias Free BW
• Decimation Rate: Variable 40-6400 (in 4 increment)
• Output I/Q Bandwidth: 10 KHz to 1.60 MHz *NEW* DDC Flatness: <0.5 dB
• Dynamic Range: 104+ dB
• MDS Preamp Off (500Hz): -129dBm 1.8 – 30 MHz
• MDS Preamp On (500Hz): -130dBm 1.8 – 30 MHz Analog to Digital Converter: 16 bit w/ Dither
• IQ Mute Control: Available on RS-232 Pin *NEW* Preselection: 10 Filters
• Attenuators: 0, -10dB, -20dB, -30dB
• Sample Rate: 80.000 000 MHz
• Memory: 65536 x 16 bit samples
• External Radio Control: Built-in RS-232 port
• Dimensions: 8” x 6” x 1.5”
• Power: 5 Volts DC @ 1.5 Amp **
• Connections: 3 x BNC (RF In, Ext Ref, IF Out) , RS-232, USB Setup, Stereo In, Ethernet, Power, RX Mute.
• Compliance: CE,FCC,IC
• Ethernet Bandwidth Requirements:
  • 2.00 MHz Output Sample Rate = 64.0Mb/s*16bit IQ
  • 1.00 MHz Output Sample Rate = 48.0Mb/s*24bit IQ 0.50 MHz Output Sample Rate = 24.0Mb/s*24bit IQ 0.01 MHz Output Sample Rate = 0.60Mb/s*24bit IQ

Resources:

• Manufacturer’s Product Page – RFspace NetSDR
• Reviews:
• Eham
• UHF Satcom
• King’s Village DX
• HF Underpants
• Retailers:
  • Universal Radio (now shipping)

The ELAD FDM-S1 software defined radio

The ELAD FDM-S1 is one of the first software defined radios to hit the market in 2012. According to the FDM-S1 retailer, WoodBoxRadio, units should start shipping in March 2012.

Though very little is known about this receiver, the specifications are quite impressive. We will post updates here and on the SWLing Post as they become available, so please check back.

Preliminary Specifications (per manufacturer):

RECEIVER

• Configuration: Direct Sampling
• ADC Sampler: 14 Bit – 61,44 MHz
• Clipping level: -5 dBm
• Digital USB Streaming Sampling rate: 192 kHz I/Q channels, 32 Bit/sample
• Digital USB Streaming Bandwidth: 150 kHz
• Sensitivity: < 0.22 microvolt (CW, BW 500Hz, 10 dB (S+N)/N)
• Selectivity: > 100 dB
• Image rejection: > 120 dB
• IP3: > 25 dBm @ 14 MHz, Spacing 2 kHz
• IMD dynamic Range: > 105 dB @ 14 MHz, Spacing 2 kHz
• Blocking gain compr.: > 100 dB @ 14 MHz, Spacing 2 kHz, CW, BW 500 Hz
• Noise floor (MDS): < -125 dBm @ 14 MHz, Spacing 2 kHz, CW, BW 500 Hz
• Attenuator: 0, 20 dB
• RF Preselection filter: OFF (Wide Band), Low Pass (0/30 MHz)

GENERAL:

• Frequency Coverage: 20 kHz to 30 Mhz (up to 200 MHz in
• down-sampling)
• Mode: CW, CWSH+, CWSH-, USB, LSB, DSB, AM. SYNCH AM,
• FM, WB FM STEREO, DRM (decoder built-in)
• Memory: XML Files
• Antenna connector: SMA (50 Ohm)
• Temperature range: 0 / 40 °C
• Frequency stability: TBD
• Frequency resolution: 1 Hz
• PC Interface: High-Speed USB 2.0 (480 Mbit/s)
• Power supply: USB powered
• Power consumption: < 2.2 W
• External I/O connector: Female DB9
• Dimensions: 108(w) x 27(h) x 88(d) mm
• Weight: 180 g

Resources

• Retailers
• WoodBoxRadio

Please check back–we will past updates and reviews as they become available.

The Cross Country Wireless SDR-4

The Cross Country Wireless SDR-4 is an affordable SDR (software defined radio)  covering the HF spectrum from 0.85 to 30 MHz. It features a Si570 low noise synthesised VFO, relay switched band pass filtering, a power FET RF amplifier and a built-in USB soundcard.

The price of the SDR-4 is £149.95 plus shipping from the UK.

Specifications/features (per manufacturer):

• Antenna isolation transformer with a 50 or 450 ohm impedance input for use with coax fed antennas or random wire antennas
• Extra antenna isolation when the receiver is powered down
• Relay switched RF band pass filters
• RF amplifier using a power MOSFET in the receiver front end
• Internal 10 MHz RF level calibration oscillator
• Built-in USB stereo soundcard
• 3.5mm soundcard audio output for headphone monitoring or connection to datamodes program
• Built in a compact aluminium case 175 x 106 x 30 mm

Resources:

Manufacturer’s product page for the Cross Country Wireless SDR-4

• Retailers
• Buy directly from the manufacturer–per their instructions: Since then demand has been very high [for the SDR-4] and rather than having a Paypal button on the webpage we have started a waiting list of potential customers. When batches of the receivers are ready we email potential customers with an option to buy a receiver. Contact Chris Moulding, G4HYG via info@crosscountrywireless.net to be added to the list.
• Documentation
• SDR-4 receiver Quick Start Guide v1.3 (PDF)
• The SDR-4 setup program (.ZIP)
• SDR-4 receiver block diagram (JPG)

The Bonito 1102S RadioJet - Click to Enlarge

Universal Radio has published the price of the Bonito 1102S RadioJet at $699.95 US and they are taking orders.

Universal’s price is  $300 less than that of the Microtelecom Perseus ($999.95 US) and the $200 less than the WinRadio Excalibur ($899.95 US).

After reading Fernando’s review of the RadioJet–where he compared it to the Perseus–this may be one of the best SDR performers for the price. We will be reviewing the Bonito 1102S RadioJet in the near future as well.

To follow all updates of the Bonito 1102S RadioJet, please follow our tag: RadioJet

The CoudSDR is the latest offering by the US-based SDR manufacturer, RFspace. At time of posting, the CouldSDR is in beta testing, but expected to ship to consumers in 2015.

The CouldSDR represents a step to make SDR over Internet much easier to implement. Indeed, RFspace describes the CloudSDR as, “The next chapter in connected Internet of Things radios.”

The Cloud SDR can be used as a traditional computer-connected SDR, much like the RFSpace NetSDR, but with a 1 MHz bandwidth window. The CoudSDR is also a self-contained server that can stream bandwidth video and received audio over the Internet, allowing remote control via a Remote SDR Client or even via a smart phone app.

RFSpace has published a comprehensive PDF brochure about the CloudSDR. You can download the brochure by clicking here.

Features (subject to change):

• Wideband spectrum analyzer mode offers 56 MHz wide spectral captures in both 2D, 3D and waterfall formats.
• 9kHz low end frequency range allows SONAR, VLF and ultrasound applications.
• External 10 MHz reference input allows multiple radios to be locked to the same frequency reference like Rb, Cs and GPS disciplined oscillators. An internal TCXO takes over when no external reference is detected.
• The CloudSDR has both external and internal triggering modes for synchronization of multiple radios as well as triggering at specified intervals. The internal trigger mode allows the phase to be adjusted, as well as the frequency in steps of 1nHz.
• The built-in remote server allows the CloudSDR to be placed anywhere in the world. A PC running Windows, Linux, Android or MacOS is able to access the radio with very low latency. It does not require a PC at the server side and the server is available within 10 seconds of boot up.
• An Android application has been developed to access the CloudSDR in remote mode. In addition, an open source client is available license free for Windows, Linux and MacOS. Programming is extremely easy since all of the DSP, FFTs and scaling are done inside the radio.
• The demodulated audio is available at the radio side to monitor or record the audio. The audio port switches to a 192 KHz capable analog I/Q output when in I/Q streaming mode.
• Optional 1 GS/s digital upconverter and signal generator can generate modulated and CW signals remotely or direct connect in the 100 KHz – 455 MHz ranges. Specs TBD.

Specifications

The Quadrus SDR is a new military-grade SDR with phase-coherent multi-channel capabilities with up to 16 channels, which means that it can be used for direction finding, diversity reception, as well as MIMO applications.

While the Quadrus line is aimed squarely at government and scientific research markets, the $1490 US Quadrus DRU-244A-1-1-PCI, a four-channel SDR, might appeal to the discerning DXer, amateur radio operator, or radio experimenter.

The Quadrus SDR is currently available as three models:

SAGAX DRU244A-1-1-PCI (Click to enlarge)

DRU-244A-1-1-PCI SDR hardware digitizer $1,490 US

• 1 one ADC chip with 1 analog input
• 1 one DDC chip with 4 radio channels

DRU-244A-1-4-PCI SDR hardware digitizer $1,990 US

• 1 one ADC chip with 1 analog input
• 4 four DDC chip with 16 radio channels

DRU-244A-1-4-PCI SDR hardware digitizer $2,490 US

• 4 four ADC chip with 4 analog input
• 4 four DDC chip with 16 radio channels

We will post technical specifications as the become available.

Click here to read the full Quadrus SDR press release on the SWLing Post.

The Elad FDM-S2 is the latest software defined radio receiver from the Italian manufacturer, Elad. The FDM-S2 is a direct sampling receiver based on 122.88MHz, 16bit single channel ADC converter covering HF 6m and offering the possibility to exploit the FM broadcast band and VHF Band (135-160)MHz.

Click here to read a full review of the Elad FDM-S2.

Features/Specifications:

• Frequency range:
  • HF: 9kHz-52MHz MDS: -132dBm @14MHz, Clipping lev -8dBm
  • FM: 74-108MHz sensitivity
  • VHF: 135-160MHz MDS -137dBm @145MHz, Clipping level -19dBm
• Separate antenna inputs for HF/6m and FM/VHF/Bypass ranges
• Max. DDC Bw 6144kHz (Aliasing free viewable bandwidth up to 5 Megahertz) currently available selectable bitstreams:
  • 192ksps-32bit,
  • 384ksps-32bit,
  • 768ksps-32bit,
  • 1536ksps-32bit,
  • 3072ksps-32bit,
  • 6144ksps-16bit
• Special double DDC mode of 2 x 384kHz bandwidth to be placed within one of the input ranges.
• 4 virtual receivers freely tunable within DDC window
• Each virtual receiver holds settings for mode,bandwidth,volume,squelch and audio output routing.
• Patent pending Triple Tuning Bar for coarse and fine spectrum navigation
• Modes:
  • CWU,
  • CWL,
  • USB,
  • LSB,
  • AM,
  • SAM,
  • FM,
  • WFM,
  • DSB,
  • RTTY,
  • DRM,
  • RDS
• Interference rejection: Noise Blanker, Adaptive Noise Reduction and auto notch, special 2 manual notches (directly placed in DDC spectrum)
• Integrated DRM decoding, text and station schedule update.
• Integrated WFM Stereo with RDS decoding.
• Universal CAT control and OmniRig(tm) integration
• Customizable IF panadapter facilities for integration with existing transceiver/receivers
• User definable bandplan, specified settings per frequency range.
• XML based memory management
• DX cluster data integration and EIBI database import
• Plotting of memory, database and cluster information directly on spectrum screen
• Proprietary Ext IO bus for accessory equipment, also offering 8 DC lines for universal switching (*via SFE1.0 board)
• Supported by 3rd party software: SDR-RadioV2 , Winrad, HDSDR, Studio 1
• DDC Spectrum recorder with automated times chedule control
• Separate IF/AF spectrum windows for detailed signal analysis
• Easy, fully informative User Interface with deep customization
• Resizable windows and multi-monitor support
• Wideband secondary Audio/IF outputs for decoder software (eg CW Skimmer, WeatherFax)
• Full integration of the Tmate(tm) series controllers
• Compact size 110 (W) x 90 (D) x 40 (H) mm and 360g, come with 2 BNC to SMA adapters, USB cable, USB double cable adapter, CD and safe bag.

Resources

Reviews:

• The SWLing Post review of the FDM-S2

Retailers:

• Elad USA

The Enablia TitanSDR is a multi-channel HF receiver with parallel demodulation, recording and analysis of up to 40 simultaneous HF simultaneous emissions.

According to Enablia, the TitanSDR is designed for homeland security and foreign intelligence (SIGINT and COMINT), military communications, environmental protection (from electromagnetic pollution), detection of interfering or illegal electromagnetic emissions (by national radio frequency agencies) and general purpose spectrum analysis.

Of course, the TitanSDR is a capable, multi-channel receiver for the discerning DXer.

The following instructional video shows how the TitanSDR application is configured and used.

Click here to download the TitanSDR data sheet.

Review: Click here to read a full review of the TitanSDR Pro on the SWLing Post

Key features:

• Direct conversion Front-End architecture
• 9 kHz to 32 MHz frequency coverage
• 16 frequency preselectors
• High front-end linearity
• One to four parallel Wideband channels (312.5 KHz to 2.1875 MHz wide)
• Up to 40 parallel Narrowband channels
• Modes: SSB, AM, NBFM, CW, eSSB, FSK, DRM
• High frequency resolution Panoramic Spectrum (305 Hz RBW)
• Wideband and Narrowband spectrum and waterfall (with custom palette)
• Record-and-replay of Wideband channels
• Scheduler of recording activities
• Tight integration with Krypto500 decoder by Comint Consulting
• Support for Code300-32 decoder by Hoka Electronic

Resources:

Enablia Electronics and Communications

The SDRplay RSP is a wideband full-featured SDR which covers all frequencies from 100KHz up to 2 GHz. At time of posting, the RSP is one of the most affordable, full-featured, SDRs on the market.  The RSP allows for monitoring and recording up to 8MHz of spectrum at a time. An open API allows developers to create new demodulators or applications around the platform.

We gave the RSP a very favorable review on the SWLing Post.

Key features:

• Robust and strong plastic case
• Continuous coverage from 100KHz to 2 GHz
• 12-bit ADC silicon technology (not another 8 bit dongle!)
• Built-in High-Performance front-end filters
• Up to 8 MHz bandwidth
• Good sensitivity and selectivity
• Low noise floor
• Simple USB interface (type B socket)
• SMA antenna socket
• Powers over the USB cable

General

• Weight: 110g
• Size: 95mm x 80mm x 30mm

Connectivity

• Single RF connector (SMA)
• USB 2.0 (high speed) type B socket

Frequency Range

• Continuous coverage 100kHz – 2GHz

ADC Characteristics

• Sample frequency 2MSPS – 10.66MSPS
• 12 bit native ADC
• 10.4 ENOB
• 60dB SNR
• 67dB SFDR

Resources

Reviews:

• The SWLing Post review of the SDRplay RSP
• Comparison of the Airspy and SDRplay RSP
• Eham
• SDRplay list of reviews

Retailers:

• SDRplay
• Ham Radio Outlet

The SDRplay RSP2 and RSP2 Pro (now replaced by the RSPdx) were built on SDRplay’s receiver technology and shared much in common with the original RSP1. SDRplay noted in the product announcement that:

“The RSP2 delivers a significant number of additional features which result in a higher spec for specialist amateur radio users as well as benefits for additional scientific, educational and industrial SDR applications.”

Compared with the original RSP1 (now replaced by the RSP1a), the RSP2 gives the enthusiast and experimenter access to more receiver parameters and control, opening it to a wider array of possible applications. The RSP2 will also cover a broader range, from as low as 1 kHz to as high as to 2 GHz, and is designed with better selectivity across the spectrum. Enhanced selectivity will certainly benefit amateur radio operators and SWL DXers who might seek weak signals in crowded portions of the band.

The RSP2 came in a basic and Pro model. The Pro model added a custom metal enclosure.

Reviews:

• SWLing Post

Resources:

• SDRplay product page

Retailers:

• Search eBay for a used RSP2

The RSPduo is unlike any other SDR in the SDRplay product line, and, indeed, unlike most of the budget SDRs currently on the market.

As “duo” implies, this RSP features dual independent tuners, both piped through a single high-speed USB 2.0 interface. With the RSPduo, you can explore two completely separate 2 MHz bands of spectrum anywhere between 1kHz and 2GHz.

SDRplay lays out several use-scenarios in their press release:

• The ability to simultaneously receive on two totally independent 2 MHz spectrum windows anywhere between 1 kHz and 2 GHz
• Simultaneous processing from 2 antennas enables direction-finding, diversity, and noise-reduction applications
• Ideal for cross band full-duplex reception, e.g. HF + VHF, or VHF + UHF
• Simultaneous Dump1090 and VHF ATC reception
• Simultaneous monitoring and recording of 2 ISM bands
• Use SDRuno to seamlessly control and manage the dual tuner in a single environment.

Externally, the RSPduo bears a strong resemblance to the RSP2pro. Internally, however, it’s quite different.

Besides featuring a second independently controlled tuner, the RSPduo also sports 14 bit ADCs and a completely re-designed RF front end, which enhances receiver selectivity and improves dynamic range.

In short, the RSPduo is like having two SDRs in one.

The RSPduo’s price is approximately $280 US.

Reviews:

• SWLing Post

Retailers:

• SDRplay Distributors
• Search eBay for a used RSPduo

Resources:

• SDRplay Product Page

The RSPdx has been introduced as a replacement for the RSP2 and the RSP2pro receivers. It has been updated and upgraded, with a completely new front-end design.

Here are the highlighted improvements and changes:

• Performance below 30 MHz has been enhanced when compared to the RSP2/RSP2pro.
• Performance below 2 MHz has been substantially upgraded. Through the use of the new HDR mode, both dynamic range and selectivity have been considerably improved.
• There is now a BNC antenna connector on antenna C position instead of a HiZ port. Both A and B antenna ports are SMA like other RSP models.

We’ve found the RSPdx to be one of the highest-performance SDRplay receivers, especially in high dynamic range (HDR) mode below 2 MHz.

The RSPdx’s price is approximately $200 US.

Reviews

• SWLing Post

Retailers

• SDRplay Distributors
• Search eBay for a used RSPdx

Resources:

• SDRplay Product Page

Building on the Airspy HF+ architecture, Airspy designed the HF+ Discovery to sport world-class performance a small form factor.

The Airspy HF+ Discovery includes extra pre-selectors for all the supported bands and a new DSP Core to optimize the gain distribution and the filtering parameters in real-time and dig deeper in the noise.

The signal path includes very high dynamic range data converters along with high performance passive mixers with a Polyphase Harmonic Rejection structure. The included band-tracking pre-selectors eliminate unwanted interference and preserve the dynamic range of the receiver.

The HF+ Discovery retails for approximately $169 US.

Reviews:

• Airspy Reviews Page
• SWLing Post reviews:
  • Coastal DXing
  • Guy Atkins’ First Impressions and comparison with ELAD DuoR
  • Ivan’s Blind Daytime Prop Comparison
  • Fenu’s Prototype Review

Retailers:

• Airspy Distributors
• Search eBay for a used HF+ Discovery

Resources:

• SWLing Post articles that feature the HF+ Discovery
• Airspy Product Page