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 _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
