Hi Ken:
I'm using an SO2R master in this test. It uses a transistor
connected to Pin 16 of LPT1. This goes through a relay controlled
by Pin 14 and drives a 12V relay for PTT out.
When I get home, I'll measure the output voltage directly on
Pin 16, with a pull-up. However, the same hardware works fine
with a different logging program, and two different SO2R masters.
It also works fine with CT9.22.
73,
Mark, KD4D
> What type of CW keying interface are you using? CT manipulates two pins on
> the
> LPT to do CW because the state of the LPT port is unknown when the computer
> boots.
>
> - Ken
>
> > ------------Original Message------------
> > From: kd4d@comcast.net
> > To: ct-user@contesting.com
> > Date: Thu, Jan-8-2004 10:26 AM
> > Subject: [ct-user] PTT Asserted on Startup, 9.92 and 10?!
> >
> > Good Morning, All:
> >
> > I'm having a problem with the PTT line being asserted when CT is
> > started. Often, nothing will clear it.
> >
> > To diagnose the problem, I installed DOS 6.22 on a newly formatted
> > partition on a laptop, ran the old CT setup program and installed
> > 9.92-001.
> >
> > When I start CT, and enter a bin filename "test," which does not
> > exist (no test.bin file), the PTT line is keyed when I hit return.
> > This is using a WX0B SO2R master box (actually, two different ones).
> >
> > John Evans and I have seen similar problems on three computers,
> > with versions 9.92 and 10. In some cases, stopping and restarting
> > CT and the TSR's clears up the problem. In others, the PTT line
> > remains asserted at all times. I have seen the PTT line cleared
> > after going through the startup menus and configuring ports and
> > setup.
> >
> > Before I spend any more time chasing this down, and trying to figure
> > out exactly why and when the problem occurs, has anyone seen this
> > problem or anything like it?
> >
> > Thanks in advance and 73.
> >
> > Mark, KD4D
> >
> > _______________________________________________
> > CT-User mailing list
> > CT-User@contesting.com
> > http://lists.contesting.com/mailman/listinfo/ct-user
> > CT on the web: http://www.k1ea.com/
> >
>
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