Tom W8JI escribió: > <<<<I am trying to use a cheap computer microphone in my K3, front 8 pin > connector. I have some doubts that I would like to solve before making a > mistake: > > 1- Can I use pin 1 directly atached to the electret capsule and set bias > in config:MIC SEL? Or should I use also some kind of resistor/condenser > arrangement to the 8V DC pin6? > 2- For GND: shoul I use pin 7, pin 8 or both pins?>>>> > > > I just went through that. My Sennheiser headset now works fine using > internal settings for bias. > > Pin 7 and 8 are the same connection point. I do not believe it is best > that they are the same, in my unprofessional opinion one should be a > shield ground and one an audio ground, but they are the same.
Oh yes, thanks for your help. I have mine working now. I have to get optimal gain and compression adjustments, but the microphone works great at first glance. > > I had to modify my audio input grounding to cure RFI. My headset has a > long cord, and when I would stretch the cord I would get bad RFI with my > yagi stacks pointed back at my house. Elecraft has a mod for this, but I > changed more. I soldered the wire around the mic connector shell to the > connector shell, and I grounded the circuit board pin 7 and 8 via a > copper foil that grounds under the cabinet screw in that corner. > > Now I absolutely no RFI into the audio no matter what I do, and with the > very long cord all stretched out like an antenna! The Elecraft mod was > an improvement, but the copper foil was a total cure for me. Thank for the information Tom. If I get some RF problems I will do that. Thank you. 73, EA4NZ, (ex EA1ABZ) > > 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
