Jon, Yes, it is audio, so the only problems with breadboarding is the possibilities of inadvertent ground loops and/or RF pickup by the circuit(s). Remember that mic levels are quite low, and that level is what you will be driving the K2 with. So the answer depends on just how rough *your* 'breadboard' circuit is. I would recommend putting the fixed audio output board in the K2 - the raw K2 audio is low level and balanced, and you need a source of single ended audio output. While one of the microHAM cable implementations draws audio from one side of this balanced signal, the level is lower than ideal. All the rest can be done outside the K2 in a small box. How small really depends on the size of the transformers you use in the audio lines - you can salvage small transformers from defunct computer modem boards, they work well. Alternately, you can follow Jim Brown's recommendations to bond the computer and radio together and perhaps eliminate the transformers.
73, Don W3FPR jperelst wrote: > Thank you all for your replies. > > I should have known that Don Wilhelm already has a solution to the problem!! > > As I understand it, all this is happening in audio frequencies versus radio > frequencies. Am I correct that I could breadboard all the necessary > circuitry outside the rig and not have to worry about creating PC boards in > the rig? > > Jon > KB1QBZ > > ------------------------------------------------------------------------ > > > No virus found in this incoming message. > Checked by AVG - www.avg.com > Version: 9.0.733 / Virus Database: 271.1.1/2677 - Release Date: 02/09/10 > 02:35:00 > > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
