If you tap on the cabinet do you hear it in the headphones? I wonder if you have something microphonic in the rig, like a ceramic capacitor or something else.
Dale k9vuj On 29, Sep 2010, at 9:58, KD3TB wrote: > 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" <idar...@gmail.com> 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:Elecraft@mailman.qth.net >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html > > > > ------------------------------------ > > Yahoo! Groups Links > > <*> To visit your group on the web, go to: > http://groups.yahoo.com/group/Elecraft_K3/ > > <*> Your email settings: > Individual Email | Traditional > > <*> To change settings online go to: > http://groups.yahoo.com/group/Elecraft_K3/join > (Yahoo! ID required) > > <*> To change settings via email: > elecraft_k3-dig...@yahoogroups.com > elecraft_k3-fullfeatu...@yahoogroups.com > > <*> To unsubscribe from this group, send an email to: > elecraft_k3-unsubscr...@yahoogroups.com > > <*> Your use of Yahoo! Groups is subject to: > http://docs.yahoo.com/info/terms/ > ______________________________________________________________ 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
