[Lowfer] LF: Methods to transmit DFCW

[N1BUG]

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 <paul at n1bug.com> 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