AW: [WriteLog] Erratic CW

Joe Subich, K4IK
Wed, 29 May 2002 07:31:04 -0400


I know that one can't control the radio, do CW and do FSK (MMTTY, etc.) 
all from the same port.  That's why I never built the interface for 
FSK/CW/PTT.  FSK and rig control take two ports no matter how one slices 
it.  I have rig control/CW/all mode PTT on one port and FSK/RTTY PTT 
on another. 

   ... Joe, K4IK 

> From: Jim Reisert AD1C
> Sent: Wednesday, May 29, 2002 6:34 AM
> To: Joe Subich, K4IK;; Roger Borowski
> Cc:;
> Subject: RE: AW: [WriteLog] Erratic CW
> At 08:54 PM 5/28/2002 -0400, Joe Subich, K4IK wrote:
> >I haven't tried it yet, but I believe one could use a single port for
> >both CW and FSK with MMTTY.  FSK = TXD, CW = DTR, PTT = RTS.  Yes, MMTTY
> >would have PTT on the "CW" line but most rigs will ignore it in FSK
> >mode.  In any case, I don't see a need to do it that way as rig control
> >(TxD & RxD), CW (DTR) and all mode PTT (RTS) can be done from a one COM
> >port ... FSK (TxD) and RTTY PTT (RTS) can be done from another 
> COM port if
> >necessary.
> I built the interface on the old N1RCT page and use it for CW and 
> FSK from the same COM port (RITTY or MMTTY).  Works with CT too.  
> Note that the radio frequency control is on a DIFFERENT COM port, 
> I don't think you can make an interface that works for all three, 
> or is that what you were speculating?