Pay your attention to my DDS. This device is controlled via a COM-port (or USB-COM converter) from a computer under Windows. The control program allows you to transfer any of the modes: CW, QRSS, DFCW, HELL, OPERA, PSK, RTTY, WOLF, MFSK-37, WSPR (2 and 15), JT9, VOICE and EbNaut on VLF, LF and MF. Such DDS is used for several years by RN3AUS, R7NT, UW8SM, UT7GH...

Среда, 14 ноября 2018, 14:50 +03:00 от N1BUG <[email protected]>:

I am looking for a better method to transmit DFCW for 2200 meter
QSOs. For my QSO with 2E0ILY I used a QRP Labs U3S for the
transmitter. This worked very well for DFCW60 when I was
transmitting every other night. For any QSO attempts involving quick
change from RX to TX it would be difficult because of the time
required to program a new message!

One possibility would be to modify this method used by N1VF for JT9
QSOs with a U3S:

https://bgelb.github.io/u3s-qso.html

I am a little concerned about messing up my trusty U3S but I may try
that.

It looks like the easy way is the old QRS software by ON7YD. This is
very interesting but I don't have a suitable transmitter. Are there
any published designs for DFCW transmitters which could be
controlled in this way? I wonder if parts would still be available?
I am guessing these used synthesizers which are not current
generation any more. :-)

Any other suggestions?

73,
Paul N1BUG