Some time ago I started losing audio while using my K3
I use Line in audio
The symptom goes as follows: talking along and next thing you know
there is no RF, further research shows that the radio is still in
transmit but there is no audio.
Put an adapter and scope on the audio input
Now I have absolutely assessed that there is audio going in to the
radio when this condition occurs.
Initially all that was needed to get going again was to un key and re
key the transmitter.
But within the last few weeks it now needs a power cycle of the radio
to regain audio.
This occurs about 30-90 seconds into a transmission.
My next step will be to take the radio apart and start re seating all
connections.
Another clue gained this morning on 75 meters was that when my audio
quits, the other station can still hear me very very faintly. Lending
credence to the audio theory.
I have never used the front panel mic on this radio, but I do have an
MH2 from K2 days that I might re purpose to plug into the front and
see what the results may be.
While I prepare for the next step in troubleshooting, has anyone else
ever seen this anomaly ?
73,
Phil K3TUF
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