TNX all for advice. ! I tried via RS232/USB FTDI but that caused problems with WSJT. As I want to use also CAT I decided to go via 15pol ACC and PC's com 1. Now I made that simple npn transistor solution and that works fine now. 73's Erwin/DK5EW http://www.dk5ew.de
Am 20.09.2011 19:13, schrieb Cady, Fred: > You can connect your PC's com port to the K3's com port and use either RTS or > DTR to key the radio. Have a look at the PTT-KEY configuration menu item in > your owner's manual. Section 3.3.2 in "The Elecraft K3: Design, > Configuration, and Operation" describes how to do this in greater detail. An > excerpt is: > > "There are at least four ways to key your K3 with a computer. The first is to > use the RTS or DTR signals in the RS232 serial port connector. Your computer > program must be able to send CW (and operate the push-to-talk, if needed) by > activating the RTS and DTR lines. The K3 converts the RS232 signal levels > (see Appendix B) to the required computer logic levels. The CONFIG:PTT-KEY > menu allows you to choose which of the two RS232 signals is used for PTT and > which is used for Keying. Table 3 12 shows the CONFIG:PTT-KEY menu to set up > for computer keying and PTT. When using this method, make sure CONFIG:PTT-KEY > and the computer program keying and PTT choices are the same." > > > > Fred Cady > fcady at ke7x dot com > "The Elecraft K3: Design, Configuration, and Operation" > www.ke7x.com > > >> -----Original Message----- >> From: [email protected] [mailto:elecraft- >> [email protected]] On Behalf Of iain macdonnell - N6ML >> Sent: Tuesday, September 20, 2011 9:58 AM >> To: [email protected] >> Cc: [email protected] >> Subject: Re: [Elecraft] com port PTT question >> >> Hi Erwin, >> >> You can't connect the COM port directly to the ACC port - you need a >> transistor in the middle to convert the high/low voltages to a "pull >> to ground". Interfaces like the ones described at: >> >> http://www.dxlabsuite.com/dxlabwiki/FSKConnection >> >> would work. >> >> 73, >> >> ~iain / N6ML >> >> >> >> On Tue, Sep 20, 2011 at 3:42 PM, DK5EW<[email protected]> wrote: >>> Hello all, >>> I have a small problem with PTT via com port and ACC plug. >>> I made a 2 pin cable 9pol from PC to ACC 15pol to K3. >>> I soldered pin 4 for PTT and pin 5 for ground. >>> I tested it for correct wire and short - all O.K. >>> Now as soon I connect the TRX-ACC and the com port (serial 9 pin) to >> my >>> PC the K3 goes on TX. >>> Any solution out there ? >>> >>> -- >>> best regards >>> Erwin/DK5EW >>> >>> >>> >>> >>> ----- >>> eMail ist virenfrei. >>> Von AVG überprüft - www.avg.de >>> Version: 10.0.1410 / Virendatenbank: 1520/3907 - Ausgabedatum: >> 19.09.2011 >>> ______________________________________________________________ >>> Elecraft mailing list >>> Home: http://mailman.qth.net/mailman/listinfo/elecraft >>> Help: http://mailman.qth.net/mmfaq.htm >>> Post: mailto:[email protected] >>> >>> This list hosted by: http://www.qsl.net >>> Please help support this email list: http://www.qsl.net/donate.html >>> >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[email protected] >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html > ----- eMail ist virenfrei. Von AVG überprüft - www.avg.de Version: 10.0.1410 / Virendatenbank: 1520/3908 - Ausgabedatum: 20.09.2011 ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
