"International friendship through amateur radio"

Category: SOTA

MMSSTV and the IC705

A recent SOTA gauntlet challenge set by Tom M1EYP spurred me into trying something old but new. Years ago, back in the dark ages of Windows XP I had a dabble in HF SSTV using the then popular MMSSTV program.

This is still available to download, but has not been updated since 2011, and officially does not support Windows 10, or the modern radios for pseudo-cat interfacing. As my weapon of choice these days is the Icom IC705, a quick google search returned a useful web page from M0IAX, who in turn had published the information from the web site of VK3DAN.

I am indebted to both for the the information, but can add a couple of gotchas, and hopefully help other 705 users avoid a long walk up a mountain only to find it doesn’t work – ask me how I know.

Download and install MMSSTV – there are several places on the interweb, the latest version is 1.13, thats the one you want.

The software .ini fie will need modification to make it compatible with the 705.

Using fie explorer, navigate to C:\Ham\MMSSTV if you used the default settings. Locate mmsstv.ini

Open mmsstv.ini in notepad – Find the two sections shown below in the original fie, then cut and paste the following content:


Cap1=3.640 MHz LSB – Aus. Call
Cap2=7.043 MHz LSB – Intl Call
Cap3=7.170 MHz LSB – Australia, USA Call
Cap4=10.132 MHz USB – Call USB
Cap5=14.230 MHz USB – Intl Call
Cap6=14.233 MHz USB – Digital Call USB
Cap7=14.240 MHz USB – Euro Call
Cap8=21.340 MHz USB – Intl Call
Cap9=28.680 MHz USB – Intl Call
Cap10=50.950 MHz USB – Intl Call

In the ini fie, locate


Change the port number to the one you use for your system – you can find this in “device manager – com ports” if you are not sure which port to use.

Save the new ini fie, and you should be good to go.

I found to my cost that the settings sometimes glitch on a Win 10 machine. If you loose coms to the radio, check the options in mmsstv – option>>setup mmsstv

The RX option screen should look like this:

The TX option screen should look like this (with PTT Port set to your com port – mine is Com3):

Click the “Radio command” button on the TX option screen and confirm that the correct com port is selected, if not, change it on the drop down, check that the VFO Polling is set to ICOM-CI-V and click ok.

The Radio command screen should look like this:

That should be it – mmsstv now working.

Have fun




QRP Labs QCX 30m kit

Whist the current lack of travel is frustrating, and the enforced “house arrest” isn’t helping much, it has given the opportunity to make progress on some of those projects that have been gathering dust for a while.

Some time ago a QCX 30m kit arrived in the post from Hans Summers of QRP labs. The kit is well packaged and contains everything you need to get on the air. I must congratulate Hans on the quality of the build notes, all 150 pages of them. This is not as daunting as it sounds, as experienced builders can skip a lot of the information, and new builders can take in the many tips and step by step instructions.

The radio is a single band 5w QRP CW only radio that has a whole host of features built in including CW keyer, CW decoder, test equipment, LCD display and ability to link to a GPS time source for WSPR transmissions and frequency calibration.

It took me a couple of nights to build, and the excellent instructions saved any problems when winding the torroids.

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QCX PCB Completed

Once built, and checked for short circuits, power was applied, so far so good, no smoke! The next job is to set up the LCD, turning the brightness pot up a little illuminated the display with a prompt asking the builder to choose the band – in my case 30m (Band choice is chosen by the BPF that you build and fit to the PCB). The next step is to set up the receiver, again step by step using the built in test equipment and covered in great detail in the build notes.

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At last it was time to test the TX, with a watt meter and dummy load attached, the transmitter can be tested by pressing the in built microswitch (that also acts as a straight key) the power meter kicked over to 0.8w output, not bad for a first transmission, at least there was no smoke. Using the inbuilt “key” for a quick CQ G4YTD instantly decoded on the screen. This feature can be turned off, but is a good aid for new CW operators.

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First TX

Frequency offset against display was a little off when measured on a frequency counter. Hans has this covered by use of a GPS driven signal source. The QCX can take data from several GPS units, but QRP labs also offer a low cost kit to build one. I purchased one with the QCX, the build took around 1 hour to complete. At the time of writing I am waiting for a 4 way molex connector to arrive in the mail, and will then use the GPS to calibrate the QCX further.

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QRP abs GPS card

The satisfaction of listening to 30m on a home built radio took me back to when I was first licensed in 1984 using a home brew HF rig, who needs the latest gazillion £ Yaewoodcom radio to have fun?

Next steps on this project are to tweak the torroids to up the power a bit closer to 5w, and finish calibrating before boxing up in the Bamotech enclosure and giving it an airing.




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