Date: Sun, 25 Jan 2009 11:57:59 +0000
From: John P-G <gm4slv@sighthound.demon.co.uk>
To: rsgb_lf_group@blacksheep.org
Message-ID: <20090125115759.40e452da@lurcher>
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	<fc7eccec0901250312v3ecc4508w18cb4406251dfb99@mail.gmail.com>
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Subject: Re: LF: RE: Re: WSPR Beacon on 503.5kHz
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Andy, LF,

I have had no problems with the serial port PTT control of WSPR.

With a normal 9-pin RS232 port, on the motherboard of the PC, I use the
RTS line for PTT switching, via a simple transistor switch with no
problems. I've never looked at the DTR line, as I haven't any use for
it in my h/b interface, while running WSPR, so can't answer for what
that line does - but the RTS seems to work as expected.

Regards,

John






On Sun, 25 Jan 2009 11:12:52 +0000 Andy Talbot
<andy.g4jnt@googlemail.com> wrote:

> I have (sort-of) sorted out the transmitter control problem.  While
> both  WSPR.EXE  and WSJT6 both refuse to properly control the
> PC-installed COM1 port, they do both behave properly with an FTDI type
> USB COM port.
> 
> So am running a WSPR beacon on 503.47kHz for a while.
> 
> Still intrigued to know why Joe's software won't drive my COM 1
> properly, whereas it works with USB based conm ports.  Whereas other
> software, including direct programming it from VB6, does allow
> complete control of DTR and RTS signal lines.
> 
> 
> Andy  G4JNT
> www.g4jnt.com
>