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Cross Country Wireless SDR-4+ general coverage receiver...frequency range extended to 70.5 MHz

CCW SDR-4+ Receiver

The SDR-4+ is an HF general coverage SDR receiver covering from 0.85 to 70.5 MHz.

It has a Si570 low noise synthesised VFO, relay switched band pass filtering, high linearity silicon germanium amplifier and a built-in USB soundcard.

Key design features include:

CCW SDR-4+ Receiver

September 2013...As a result of development work on the CCW Sentry SDR transceiver the frequency range of the SDR-4+ has been extended to cover the 4m amateur band. The frequency coverage is now 0.85 to 70.5 MHz. This new version also includes a revised USB sound card and a new antenna isolation transformer with a 2 kV working voltage rating without the 450 ohm antenna input.

March 2017...As a result of further development work following the unavailability of the original component the RF amplifier has been changed to a high linearity silicon germanium device. The receiver IP3 measurement is now +16 dBm measured with two -2 dBm carriers 200 kHz apart at 14 MHz.

£189.95 (inc Tax) £158.29 (exc Tax). The PayPal button automatically adds 20% VAT if the buyer is in the UK or EU. It also adds the correct shipping cost. Customers outside the EU pay the lower (exc Tax) price.


The SDR-4+ receiver no longer uses "dual use" (military/commercial) devices so it can now be sold without restriction.

The SDR-4+ receiver set-up FAQ sheet can be downloaded as a PDF file here .

The SDR-4+ receiver Quick Start Guide v1.6 can be downloaded as a PDF file here .

The SDR-4+ USB driver installer can be downloaded as a zip file here . The USB installer program loads a driver certificate then the driver file so that it works on the latest versions of Windows.

The SDR-4+ setup program can be downloaded as a zip file here . This installer program stores the USB drivers in a folder C:/SDR-4+ and places the ExtIO files in the HDSDR and Winrad folders in Program Files and Program Files (x86).

This is a link to our CloudMe folder allowing the files included on the CD shipped with each receiver to be downloaded here .

The SDR program we recommend for first time users of SDR receivers is HDSDR which can be downloaded here .

Authors of SDR software programs or other radio programs can add support for the SDR-4+ to their software using the SDR-4+ interface specification.

The first YouTube video is from our distributor LAM Communications giving details of the setup and use as a panadaptor.

Contact Chris Moulding, G4HYG via

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