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
