Louis, It goes away in TX TEST. So I suspect it is an RF-in-the-shack problem. Try the K3 into a dummy load to verify that assumption.
If it is OK on a dummy load, your best fix is in the antenna system - better baluns, check antenna connections and anything else that can cause common mode feedline currents.
73, Don W3FPR On 9/18/2016 8:53 PM, Louis Ives wrote:
My Upgraded K-3 has a noise when the transmitter is keyed. The noise sounds like either some type of data noise or a severe feedback The noise is there the moment that the radio is keyed, no type of voice input needed. I have checked all settings and can find nothing that is out of spec. I bypassed the 100 watt amp and the problem was still there. I am using Heil Proset headset and when the radio is put into test the audio is fine in the headset. I used the recorder to make sure the noise was there during transmit and I also set up a second radio to monitor the K-3. The noise was still there. I have no idea what to check next, if anyone has a suggestions it would be appreciated.
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