I thank everyone for their suggestions regarding the Line in settings. I have tried the following and still find the back ground noise Monitor on SSB (Microphone disconnected).
MIC SEL - rFL, fPL and Line In settings - still hear fan noise on keying MIC+LIN - On or Off makes no difference. I even pulled the Lin in and Lin out plugs to the K3 - still hear fan noise on keying. I do not think it is coming from the Lin In plug? A future firmware option maybe to turn off the Lin in when keying the mic even though this would not solve my problem. Please keep the suggestions coming. Thanks, Irwin - KD3TB On Sep 28, 2010, at 12:20 PM, "KD3TB" <[email protected]> wrote: > I am trying to find and resolve the source of speaker/headset noise I am > getting with my K3. The noise sounds like a continuous fan noise in the > background. I think the noise is showing up in the Monitor circuitry ? Any > suggestions would be appreciated. > > > > I discovered a high noise level coming from the K3 when I key the > transmitter in SSB. I am not sure if it was there before, as I rarely use > the Monitor function. It occurs with/without any headset connected (appears > in the radio speakers too) and with/without any microphone connected. I > have also tried a number of different microphones and headsets. I get the > noise in both Test Mode or Normal transmit mode. I also get the noise when I > transmit into a dummy load. I am using a Monitor Level of around 8 to hear > the noise. Obviously it gets loader with a higher Monitor settings. > > > > Here are my settings and what I have tried so far: > > > > MIC SEL - High or Low makes no difference; Bias on or off (should be off > for my microphones) makes no difference. > > TX GATE - On or Off and tried different settings - No difference, I even > hear the noise at a setting of 25. I have set it to On with a setting at > 09 > > No difference with Pre-Amp or Noise Blank on or off. > > > > I have played around with the MIC and COMP setting with no Mic connected. As > I raise the MIC and COMP settings, the noise gets louder. > > > > Finally I set the radio to: > > MIC - set to 20 > > COMP - set to 20 > > > > I have the latest Firmware with both my K3 and P3. The K3IO Buffer Kit Mod > for the P3 was done. > > > > Any suggestions on setting(s) that I may be missing would be appreciated. > > > > > > Thank you, Irwin KD3TB > > ______________________________________________________________ > 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 ______________________________________________________________ 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
