FT4 and JS8Call

These are two digital modes I have never tried. The former is faster than FT8, but less sensitive. JS8Call allows chatting with a keyboard, but is basically the same as FT8. JS8Call is meant for real communications.

See JS8Call | The official site for JS8Call

FT8/FT4 and very brief Es openings

Up to now I have always used FT8 rather than FT4, especially with QRP.  FT4 is quicker, but not as sensitive as FT8. I can imagine with Es out of season, FT4 might catch some openings that FT8 might miss. 

This would apply for other types of propagation too where very brief openings might occur. I can imagine some F2 DX openings might be very fleeting. FT4 might catch these. I am not sure how many monitor FT4, but I imagine far fewer than FT8. 

One useful future WSJT-X enhancement would be automatic detection of FT8 and FT4 speeds so stations could use either modes in either slots. 

FT8/FT4 presentation

Southgate News has a link to a USA YouTube presentation on these modes. There are lots of presentations about these digital modes on YouTube. FT8 works with low power and simple antennas, but is not a mode for chatting. 

I have to admit, I have not yet tried FT4.

See http://www.southgatearc.org/news/2020/november/ft8-and-ft4-lecture-video.htm#.X7ufE2iTLrc

FT4 - not tried

Although I love FT8, I have a confession to make: I have never tried FT4!

At some point, I must do so. It is much faster than FT8, but probably not as good on very weak signals. I don't know about Doppler, but I suspect it might be better on very brief Es openings.

FT4

Although release candidate versions of WSJT-X have been released including FT4, I think I shall now wait for the fully released version before installing. FT4 sounds like a useful Es mode with its shorter periods. It is not quite as sensitive, but with Es signals are often strong even with QRP.

See http://physics.princeton.edu/pulsar/k1jt/wsjtx.html

FT4

Digital mode FT8 has become enormously popular. Apparently a new release candidate of the faster FT4 is due out in a few weeks. I have yet to try FT4.

FT4 digital contest mode

My friend Steve G1KQH alerted me to this. It is a new variation (faster) of FT8 for digital contests.

See http://southgatearc.org/news/2019/april/new-digital-mode-ft4.htm