Re: [Elecraft] K2: sending PSK31
On May 20, 2007, at 4:36 PM, Peter Wollan wrote: The documents on the Elecraft site suggest that sending PSK31 requires a cable to the K2 mic plug, with a 10:1 voltage splitter to reduce speaker voltage to mic levels, and a PTT switch which could be as simple as a manual toggle. Is the PTT switch needed? Has anyone used vox on the K2 for this? VOX works with the K2. Sometimes the VOX will become slightly deaf, though. The thing I don't like about using VOX is that you have to drive the transmitter slightly harder in order to get the VOX to reliably trip. The K2 VOX isn't the best design in the world. I'm using the excellent Cocoamodem program on a Macbook, so far only for receive. If you can wire up a serial port (I use a Keyspan USB-to-Serial adapter), you can use CocoaPTT for this purpose. It's a little program written by Kok Chen that will key a serial port pin (DTR) when it is time to key the transmitter. Works great with Cocoamodem. I've also used the K2 with MMTTY and N1MM software. N1MM is interesting that it can key the transmitter with a serial port command (not just DTR), and that seems to work pretty well, too. Bill Coleman, AA4LR, PP-ASELMail: [EMAIL PROTECTED] Quote: Not within a thousand years will man ever fly! -- Wilbur Wright, 1901 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K2: sending PSK31
Following up on my earlier question, I can report that the minimal PSK31 interface described in the Elecraft Application Notes actually works. For receive, I got a stereo cable with plugs on each end, running from the K2 speaker jack to the computer line in, and for sending a stereo cable from the computer earphone output goes to an 8-pin mic plug with two resistors in it, 10K and 1K, as a voltage splitter. Transmit is keyed by vox. No isolation tranformers, no USB mic converter. Computer is a MacBook, software is Cocoamodem, and they work just dandy, though I'd expect any other computer-software combination to work, too. The hardest part of it all was locating an 8-pin mic plug for sale in the US -- Cheapham.com came through. Peter N8MHD ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K2: sending PSK31
The 8-pin plugs are available at your local Radio Shack (#274-001A). 73, ed - k9ew The hardest part of it all was locating an 8-pin mic plug for sale in the US -- Cheapham.com came through. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K2: sending PSK31
The documents on the Elecraft site suggest that sending PSK31 requires a cable to the K2 mic plug, with a 10:1 voltage splitter to reduce speaker voltage to mic levels, and a PTT switch which could be as simple as a manual toggle. Is the PTT switch needed? Has anyone used vox on the K2 for this? I'm using the excellent Cocoamodem program on a Macbook, so far only for receive. A simple stereo cable seems to work fine, and the program has a spectrum display feature that works quite well for setting filters -- a substitute for Spectrogram. Now I'd like to send, too. It doesn't look very hard, whether the PTT switch is needed or not, but it would be nice to hear if someone else knows that vox either does or doesn't work. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K2: sending PSK31
Hi Peter, this weekend I make my first Tests with K2 and Cocoamodem: I used the K2-Vox and its worked fine. But I have a EA6BLQ-Interface (outside the K2) and will used this Vox. I'll test this next days. vy 72 de 'Karl'-Heinz, DF7KHK ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K2: sending PSK31
Hi Karl-Heinz, this weekend I make my first Tests with K2 and Cocoamodem: I used the K2-Vox and its worked fine. But I have a EA6BLQ-Interface (outside the K2) and will used this Vox. I'll test this next days. witch usb-serial adapter is in use at your station? 73 de thomas, dk2nb ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K2: sending PSK31
Hi Thomas, no USB-Serial-Adapter. In the moment, I used the K2-Vox and the iMic Sound-Interface for digital mods. vy 72 de 'Karl'-Heinz, DF7KHK ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
