KX1 case warm

[Pierre]

Thanks Don for the suggestion. I repaired the broken trace and the KX1's case in cool again...

The problem was that the path between pin 2 of U3 and pin 17 of U1 was broken. Don't know why it made Q6 hot, but anyway it's Ok now

72/73 de Pierre Ve2PID
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[Don Wilhelm-4]

Pierre,

That trace broken would likely let the input to U3 float to a high level
which would turn on the 6T voltage rail - providing power to the
transmitter components.  The result is that the transmitter is being
keyed, but not at the correct frequency - it would be at the frequency
of the receive VFO.
I hope you did not have it connected to an antenna, because that signal
4915 kHz above the receive frequency could have been radiated, although
the low pass filter would reduce its amplitude substantially.

73,
Don W3FPR

Pierre wrote:
> Thanks Don for the suggestion. I repaired the broken trace and the KX1's case in cool again...
>
> The problem was that the path between pin 2 of U3 and pin 17 of U1 was broken. Don't know why it made Q6 hot, but anyway it's Ok now
>
> 72/73 de Pierre Ve2PID
>  
>
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