Tag: wspr

472 kHz reception on WSPR

Having played around with the Wellbrook loop on 7 MHz the other evening I decided to try some 472 kHz reception on WSPR. I had never tried 472 kHz before, as the combination of local noise and poor antenna has always put me off.

The Elad FDM-DUO seems quite sensitive down to 100 kHz (the specifications says 10 Khz), and coupled with the Welbrook this seems to work really well. The signal to noise ratio of received stations has improved dramatically, and the screen was soon populated with stations all over Europe.

The Elad also has 2 antenna sockets on the rear, one is configured as RX only, and the other TX/RX. Although I didnt transmit this type of set-up works well if you intend to use a separate receive antenna.

Radio user completed a review of the Wellbrook antenna, and you can read that on-line.

The Elad is a QRP radio that works on all HF bands from 1.9 MHz to 50 MHz with power selectable from 0.3w to 5w. RADCOM did publish a review in March 2015, available for members to read. Its a SDR that can be run standalone, and works like a normal radio with a front panel and VFO or connected to a computer.

Dial freq for WSPR is 474.2 USB. Using software available free from Joe Taylor K1JT.

Here is a screen shot showing stations received.


After 24 Hrs I had received the following stations. This data can be represented on a map


Some graphed data, signal v time for PA3ABL/2



Graphed data DK7FC signal v time.






73 Dave M0TAZ

Icom 7100 and WSPR 2.12

Option 1 Using WSJT-X

WSJT-X supports JT65, JT9, WSPR and JT4. This may provide better compatibility than WSPR v2.12 but essentially both can work. WSJT-X has the advantage of supporting multiple modes, and also you can set the radio control to “Ham Radio Deluxe” and let HRD provide the CAT control.

WSJT-X can be downloaded here, and provides native support for many newer radios.

Option 2 Using WSPR 2.12

I was looking on-line for resources on how to configure the Icom 7100 for use with WSPR  v2.12. The WSPR software can be downloaded free from K1JT website and runs under most version of Windows. I currently use Windows 8.1.

The problem is the Icom 7100 is not currently supported for CAT in this older software, and I was trying to get online with WSPR on 70 MHz in time for the sporadic E season.

I read online that various people had some success, but I was unable to find all of the setting on one page. After trying various options I can confirm its now working, so to assist others here is the configuration that worked for me, and I hope for you.

WSPR 2.12 Set up, firstly looking in the station parameters, set the following. You will need to select your correct COM port, and ensure CAT is ticked. Set the radio to Icom 7000 and data rate to 19200, data bits to 8, stop bits to 1. I setup the handshake to be “hardware”
Station setup

I also needed to make some changed to the radio, under SET, Connection, CIV I changed the radio address to CI-V to 70h, and checked the CI-V baud rate was 19200.

Icom setup



Using these setting I was able to connect to the radio, and PTT via CAT. This enabled me to run WSPR on 70 MHz. Good luck, hopefully this is helpful if you are trying to connect this fine radio to WSPR and hope to see you on the bands soon. 73 Dave M0TAZ.