Re: [Elecraft_K3] Re: K3 - background hiss (noisy K3) - update
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Also some USB devices and cords can cause noise at times so lookout for that.
Try unplugging or powering off nearby devices.
Find me on "Zello", a walkie talkie or handi talkie type app. I'm listed as KE5GBC. I'm mostly on late at night.