<div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">On Thu, Dec 7, 2017 at 1:45 PM, Mike <span dir="ltr"><<a href="mailto:f5in@wanadoo.fr" target="_blank">f5in@wanadoo.fr</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">I have a new pc but no lpt on mainboard<br>
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how use cw cntest via usb port</blockquote><div><br></div><div>What is the make / model of PC? In some desktop PCs, it is easy to add an LPT port by adding a PCI card or a motherboard LPT adapter. In some older Notebook PCs it is easy to add an ExpressCard LPT adapter.<br></div><div><br></div><div>Win-Test also supports CW and PTT via serial port pins. See <a href="http://docs.win-test.com/wiki/Interfaces#COM-port_CW_keying" target="_blank">http://docs.win-test.com/<wbr>wiki/Interfaces#COM-port_CW_<wbr>keying</a>.</div><div><br></div><div>What is the make / model of the radio? Some radios have built in CW keying and PTT via serial port pins (Elecraft K3, Yaesu FT-991, Icom IC-7300, IC-7610, IC-7851). In those radios, no external keying circuit is needed, just set DTR=CW, RTS=PTT on the Radio's COM port, in Win-Test, and set the menu in the radio to match.</div><div><br></div><div>For older radios, you will need a USB-to-Serial adapter and a serial port keying circuit.</div><div><br></div><div>Recommended devices (you would need both)</div><div><ol><li>FTDI USB-to-Serial adapter: <a href="https://www.digikey.com/products/en?keywords=768-1138-ND">https://www.digikey.com/products/en?keywords=768-1138-ND</a><br><br>Avoid cheaper USB-to-Serial adapters with Prolific chips. Only use FTDI, Eltima, Edgeport, Gearmo.<br><br></li><li>Serial keying circuit: <a href="https://www.ebay.fr/itm/W2ENY-RS232-Computer-Key-Interface-CT-N1MM-CW-Type/351072107524" target="_blank">https://www.ebay.fr/itm/W2ENY-<wbr>RS232-Computer-Key-Interface-<wbr>CT-N1MM-CW-Type/351072107524</a><br><br>(CW only, no PTT)</li></ol></div><div>73,<br></div><div>Bob, N6TV</div></div></div></div>