Phil and all, The Rigblaster is capable of controlling PTT from its serial port connection.
I don't have a RigBlaster, but I just looked at the schematic and see that you must have P5 pin 1 jumpered to pin 10 (PSK31 programs control PTT with the RTS signal), and you must jumper P1:B pin 18 to whichever pin you use on your K2 mic jack for PTT (if your K2 is wired for the Elecraft configuration with mic pin 2 as PTT, you would wire P1:B pin 18 to P1:B pin 25). That should allow the RS-232 interface, the Foot switch as well as the front panel mic input to control the PTT line. Of course, the AUTO/VOX switch should be in the AUTO position. I don't know how that squares with the Rigblaster instructions, but it is what their website schematic indicates must be done. After looking at the Rigblaster schematic, I am amazed that they did not include a transformer in the headphone jack to soundcard connection. What that means is that despite all the optoisolators used in this unit, the headphone jack connection negates any other attempts to isolate the computer ground from the transceiver ground. Now I realize there is yet another reason for all the hum and noise complaints about the audio when the Rigblaster is used. I would strongly suggest modifying the RigBlaster by adding a transformer to break this sneak ground path - if that is possible in this unit (it may not be due to the physical ground arrangement). 73, Don W3FPR > -----Original Message----- > > On Mon, 04 Sep 2006 10:12:47 -0400, Michael E. Dobson wrote: > > >Once you have receive working, the instructions supplied for the K2 > >should work for transmitting but that will depend upon how you wired > >the microphone connector on your K2. Make sure you have the > >RigBlaster jumpered so that the signals appear on the same pins as > >they do on your microphone. > > I have the RigBlaster connected to one computer serial port and > the K2 connected to another for remote control via Ham Radio > Deluxe. The main question I have is if there is a better way > to get the computer to trigger the transmiter than to use the > VOX. > > >The only problem I encountered was not being able to use the > >microphone through the RigBlaster due to hum on my audio. I suspect > >this is a grounding issue caused in part by not having the > >microphione jack in the K2 grounded in my version, S/N 2221. Next > >time I open it up for mods, it is my To Do list. > > I have a much later K2 and have had no reports about hum. > > -- > 73 de K2ASP - Phil Kane > Elecraft K2/100 s/n 5402 > _______________________________________________ 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
