<<One of the things I plan on doing is getting a simple 4 output headphone amp from ART ($65). Plug one or 2 pairs of headphones in, and output another to my computer, and another to a real amplifier/speaker setup.
That way I never have to unplug the set to have an output to my computer for Data or voice.>> I use the line output for my computer, including sound recording. That way radio audio level settings never affect digital mode decoding. I use the rear panel speaker out for my headphones or speaker, and have a desk mounted switch that lets me use multiple headphones on any audio channel. Any desk anywhere can hear any radio any time no matter what or who is using the radio. In the contest barn 5 people can listen to the same channel, or all on different channels. Since the K3 speaker audio out is low impedance, and I bridge in with at least 160 ohms of load impedance, audio level does not change no matter how many phones bridge in. To get speaker output I have a fader control and a mono amp, a cheap MFJ616. The fader moves the 616 to either left or right line, since I do not have stereo speakers. ALL of the line taps, and the lead to the computer, are isolated by transformers to prevent ground loops (aka Pin 1 problem) . If there is general interest I could put up a schematic, but it's a simple clean system that has great flexibility and never requires moving plugs. You can see the audio boxes at: http://www.w8ji.com/my_shack.htm for the house station. http://www.w8ji.com/contest_station_w8ji.htm for the contest station Since buss impedance is high normal CAT-5 cable makes a great audio buss. Each station, except the one feeding the buss, is isolated by transformers. 73 Tom ______________________________________________________________ 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
