My K2 seems to have a rather strange intermittent buzzing sound that occurs only when I press DISPLAY for the display to turn on/off the DSP noise reduction and notch filter. The buzzing sound goes on and off at an approximately 1 sec cycle. This occurs only when the NR and notch filter settings are displayed and it goes away when DISPLAY is pressed again to display the power supply voltage. It doesn't seem to occur under any other circumstances. It's more noticeable when there is no antenna attached and much more noticeable when in USB/LSB rather than CW (probably an affect to the wider bandwidth when in USB/LSB). Turning on the DSP noise reduction reduces the volume of the buzzing sound along with the background noise. Other than this intermittent buzzing sound, everything appears to be working normally. I don't know if this is a new thing or if it's been there all along and I never noticed it. So, what is this? Thanks. Bob W1SRB ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected]
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