My K3 delivers only the left channel when listening with Heil stereo headset or an aviation stereo headset. The Heil I tried from the front and back plugs, the aviation from the front only. I have the sub receiver. I usually use the radio with the speaker and only now found out one channel is out. I don't know how long it's been that way. I have not been fooling around with it. RF gains is full CW for both main and sub. AF gain as desired, tried at full volume. It won't work split or sub. I've checked every item in the Menu and Config settings per the Dec 7 2010 manual and the radio. All appear to be right. Any tips, please advise. Jim NO0B
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