Chris,
Yes, the most likely suspect is Q9, but it is quite hardy and seldom fails.
Take a look at the gate voltage to Q9 while keydown (you can set the
power to zero for that test, or work the K2 into a dummy load).
If the gate voltage goes to 5 volts or so, then Q9 is the problem. If
it stays near zero volts, then one of the drivers to Q9 gate has failed.
73,
Don W3FPR
On 7/13/2024 1:54 PM, Chris wrote:
Hello,
My K2/100 has an issue with the PA KEY (J7). With the key down, it has
about 350k ohms as opposed to the specified 3 ohms. Will replacing Q9 fix
the issue, or can there be other areas that can cause this issue?
Many thanks,
Chris KM1B
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