Read the part about CT-WIN in this:
http://www.k1ea.com/CT_additions.htm
 
I believe the circuit in here works for LPT CW keying:
 
http://docs.win-test.com/wiki/Interfaces
 
GL/73,    Bob K8BL
 
From: R.T.Liddy [mailto:k8bl@ameritech.net] 
Sent: Thursday, February 21, 2013 4:31 PM
To: Barry Wright
Subject: Re: [ct-user] CTWIN CW Keying
  
Barry,
 
When I began using CT-WIN after my DOS computer died and I got a "new" one
with XP, I found out CT-WIN doesn't key directly except through the LPT Port.
 
I had to build an interface to do it with plans readily available on the 
internet. It's
very very simple with only a couple parts and a connector. Works great!
 
GL/73,   Bob K8BL
--- On Thu, 2/21/13, Barry Wright <vihraw1@gmail.com> wrote:
From: Barry Wright <vihraw1@gmail.com>
Subject: [ct-user] CTWIN CW Keying
To: ct-user@contesting.com
Date: Thursday, February 21, 2013, 6:18 PM 
Sorry for the bandwidth, but could someone please verify that there is no
way cw rig keying can be done through a com port with CTWIN?
Thanks,
Barry - KA7V
Oregon - DN14ma
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