I discover it is possible to transmit image with on few 😊
Have you ever tested it ?
For exemple in MFSK-16 mode which can be used for direct chatting also :

I would be happy to test this mode. I should be available this Wednesday at 15:00 UTC on HF (40,20,15 or 10m). I don't know which frequency to use

I have found standard frequencies for MFSK :

1838, 3580, 7037, 10147, 14080, 18105, 21080, 24929, 28080 Khz

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@F1RUM I played with some PSK modes a couple of years ago. It was fun but I found chat style QSOs impossible as everyone uses macros so there's no time for free form text.

Whenever I tried to actually type anything directly the other op would assume I had gone and just call CQ!

@m0puh 😕 it's less funny.
I manage to have a QSO with a German. Effectively, all his text seems to be ready and well formatted.But when I said it was my first MFSK QSO, he answered with a personalized message

@F1RUM that's cool!

I have a friend who likes Olivia, but we've yet to hear each other.


This is the first time I hear about sending images in MFSK-16! Unfortunately I have a very poor setup for digital modes (my transceivers are quite old also and they do not always work well together with my SignaLink modem). But I discovered that I can receive images in #SSTV in remarkably good quality. I haven't yet tried to send myself but I'm planing to try in the future.

@es0mhi setting up software, sound board and transceiver is not easy. I use a Yaesu SCU-17 sound board on a FT-450D with GNU/Debian. I've spent many hours to have wsjtx and fldigi working. I do backup before any sensible upgrades 😨


In my case the problem is mainly the hardware. The SignaLink gets lots of praise for working with practically any transceiver. But it is in fact very tricky to regulate the output power with older transceivers. Power output depends on the transceiver output, mic gain, tx knob on the signalink and even the actual propagation. Plenty of fiddling! I always imagine that with modern transceivers it's 'plug and play'.

@es0mhi Now I understand the "D" at the end of FT-450D. It is an optimized version of the FT-450 for digital modes. For sure, output power (for sound board) is stabilised.
However, I've tried to receive SSTV images without success. But it certainly due to me and not hardware


I wonder if a transceiver like yours would change my whole attitude concerning digimodes.

The problem with older transceivers is that they have no data jack. So what you do is, you feed the soundcard output to the mic jack. That works - I've made a 100 contacts or so - but not great (as I explained earlier).

As for SSTV: interference and QSB is really critical. If you have good conditions on 20m (14.230) than receiving results can be amazing.

I'll show you a station received from France and another from (asiatic) Russia (about a month ago, on 14.230, around 12 UTC).

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