K3 front panel mic audio and monitoring...

[VK7JB]

Hi Iain,

Just to let you know that I've noticed the same issue on my K3 #5102.

It's present only when I have the front panel mic socket active. When I use the rear panel mic input with my headset, the problem is not there.

Like you, the problem increases as compression is increased. It's not dependent on the mic I have connected to the front panel mic connector. MIC + LINE in is OFF.

I wondered if this was some internal feedback associated with the audio amp chain connected to the front panel, but I don't know. I also wondered if it might be RF, somehow finding its way into the front panel audio chain, but not the rear?  

I haven't found a solution. If you do, please let me know.

73,
John
VK7JB
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