[Elecraft] MMTTY FSK

[Brett Howard]

I'm one of those guys that is a glutton for punishment...  To me the
fact that FSK is more complicated and I've not done it before is the
actual advantage.  I do see FSK as a method that is slightly less prone
to TX distortions.  I built my interface using opto couplers and then
put in a few jumpers to allow for several grounding situations.  Turned
out that 100% disconnect between all grounds is working very well.

~Brett (N7MG)

On Fri, 2010-06-11 at 19:28 -0400, Mike wrote:
> When I got my K3, I was hot to get it set up on FSK. Somebody here 
> convinced me to try AFSK, and I was blown away by how simple it is, and 
> less complicated to set up. AFAICT, FSK offers no advantage.
> 
> 73, Mike NF4L
> 
> Brett Howard wrote:
> > Ok so I've never done RTTY via true FSK only audio modes...  I have to
> > put in a fence this weekend so I won't be able to play this weekend but
> > I'm trying to get ready for FD...  
> >
> > So I've made an interface that consists of a couple opto couplers (one
> > for FSK and one for PTT)...  I've got the radio all setup and shorting
> > the FSK_IN pin to GND makes the radio switch tones as it should...
> >
> > However I'm having issues getting MMTTY to open the COM port.  I'm using
> > an FTDI based USB->RS232 converter.  The MMTTY settings have the USB
> > button right there and they tell me to click on the last 3 options.
> > I've tried all 3 but in all 3 modes I get the unable to open COM3
> > error...
> >
> > I'm going to be googling and seeing if anyone else has had this issue
> > with me but I figured I'd pose here in the event someone here has
> > already run into this issue.
> >
> > ~Brett (N7MG)
> >
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