I've had my K2 built for about 2 months now. Everything works except the noise
blanker. I've looked at a lot of archives on this. What I have done to test
it is:
1. Scratch the top of Q21 on the RF board to generate noise.
2. Using an oscilloscope, I can trace the noise pulse through Q2-Q4 on KNB2
borad.
3. I do see a noise pulses on the "GATE" node and at the base of Q5. When I
turn off the NB, this pulse goes away as expected.
4. I do not see any pulse on collector of Q5. Since the pulse on the base of
Q5 saturates Q5, should I see anything on the collector?
I'm not sure if I have a bad Q5. I am going to replace it today.
Thanks,
Leon, NE0N
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