K3 Experts: My K3-100 has been flawless in its performance until yesterday. I had a schedule with W5ZNN who told me I had a hum on my signal; I put my headphones on and sure enough there it was on transmit. I tried plugging the Astron 35M directly into the AC outlet instead of the outlet strip - no luck, hum was still there. I connected the K3 to my SEC 1223 switching power supply and, you guessed it, the hum is still there. I hate to think there's something amiss with the K3 but it looks that way. Any ideas? 73, Cary, K4TM Lynchburg VAh [email protected]
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