<div class="gmail_quote">On Fri, Sep 3, 2010 at 2:07 PM, John Wayman <span dir="ltr"><<a href="mailto:g4drs@btinternet.com">g4drs@btinternet.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div><div style="font-family: 'times new roman','new york',times,serif; font-size: 12pt;">When I had a play in SCC RTTY last weekend, I was unable to figure out a way to have WT key the PTT. </div></div></blockquote>
<div><br>In RTTY mode, all PTT work is delegated to MMTTY, because only MMTTY knows how long it takes to send an RTTY message.<br> <br></div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div><div style="font-family: 'times new roman','new york',times,serif; font-size: 12pt;"><div>I am not sure I have understood things correctly, but it seems that MMTTY has no means of switching PTT via LPT port pin 16, and that WT does not bother with switching PTT when MMTTY is running.</div>
</div></div></blockquote><div><br>Both are correct statements. I am not an RTTY expert, but <a href="http://www.g4zfe.com/rtty.html">this web page</a> explains how to use extfsk and dlportio to do PTT via an LPT port in MMTTY. Unfortunately it looks like extfsk only gives you the option to use Pins 1-9 (Strobe, D0-D4 and D5-D8) for PTT; Pin 16 is not an option!<br>
<br></div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div><div style="font-family: 'times new roman','new york',times,serif; font-size: 12pt;">
<div></div><div></div><div>Use a
different dedicated com port for each radio to switch PTT - not my choice because PTT is all cabled up via LPT pin 16, and besides, who has that many com ports?</div></div></div></blockquote><div><br>An easy hardware fix would be to make a plug or adapter that connects LPT pin 9 to pin 16 instead of pin 16 to pin 16, and use that for RTTY.<br>
<br>Better yet, the microHAM router supports FSK and PTT via DTR on the same COM port. But it sounds like you are using AFSK.<br><br>Here's a quote from the MK2R manual (may also apply to your microHAM box, but you didn't specify what you are using).<br>
<br>"PTT: The virtual port used for FSK can also support PTT (required by MMTTY). When you use MMTTY,<br>select the PTT box and RTS will used for PTT"<br><br></div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div><div style="font-family: 'times new roman','new york',times,serif; font-size: 12pt;"><div>So, I have a fully set up SO2R station for CW and SSB, all nicely cabled up (by my standards, anyway!), which I have to
re-configure to run RTTY. Can that be right?</div></div></div></blockquote><div><br>No, not if you use FSK instead of AFSK. What radio are you using? What microHAM box are you using? <br><br></div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div><div style="font-family: 'times new roman','new york',times,serif; font-size: 12pt;">How have you got around this problem?</div></div></blockquote><div><br>I use an MK2R+ with an Elecraft K3 in FSK mode, virtual COM5 for FSK and PTT for Radio 1, COM6 for FSK and PTT on Radio 2.<br>
<br></div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div><div style="font-family: 'times new roman','new york',times,serif; font-size: 12pt;">
<div></div><div>Is it possible to have WT switch pin 16 on the LPT port during RTTY messages in the same way as it does on CW and DVK messages?</div></div></div></blockquote><div><br>No, because Win-Test doesn't know how long to hold down PTT.<br>
<br></div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div><div style="font-family: 'times new roman','new york',times,serif; font-size: 12pt;">
<div>How does it all work without fuss in Logger32? Is whatever happens there the answer to my problem?</div></div></div></blockquote><div><br>Perhaps it uses Radio commands. With the latest microHAM Router program you can assign <i>two</i> virtual COM ports to the same radio. Use one COM port for Win-Test radio control, and use the other virtual COM port for MMTTY PTT via radio command, perhaps.<br>
</div></div><br>73,<br>Bob, N6TV<br>