Paul,

One approach I’ve been considering is using an Arduino to generate DFCW. The 
book “Arduino Projects for Amateur Radio” has several related projects (CW 
Keyer, frequency generators, etc.) that could be pieced together, I think, 
relatively easily to produce a pretty nifty DFCW Keyer.  The book is also a 
good tutorial for people like you and me who have done some programming in 
previous lives hi hi.

I’ll pull the book out and take a closer look at it again.  I have used Arduino 
for other projects so have a number of mother boards and displays to play with 
here :-).

73,
Rob - K3RWR

> On Nov 16, 2018, at 06:32, N1BUG <[email protected]> wrote:
> 
> Thanks Andy. I have no proficiency at all in PIC or Arduino
> programming. In my younger days I wrote some reasonably complex DOS
> programs but a lot has happened since then an the old brain isn't
> what it used to be I'm afraid.
> 
> I am not against *trying* to learn but will consider this a last
> resort if no more complete or operator friendly system can be found.
> 
> 73,
> Paul
> 
> 
>> On 11/14/18 10:42 AM, Andy Talbot wrote:
>> Depends how proficient you are with PIC or Arduino or Whatever programming.
>> There are still AD9850 moduiles to be found on Ebay - that are not
>> completely obsolete or sold-out yet.
>> 
>> Write your controller code to switch between two or three (for DFCWi)
>> frequencies under control of the ON7YD software, toggling RTS / DTR on a
>> COM port interface (use an FTDI USB one if necessary)
>> 
>> 
>> www.g4jnt.com
>> 
>> 
>> 
>>> On Wed, 14 Nov 2018 at 11:50, N1BUG <[email protected]> wrote:
>>> 
>>> 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
>