Brian,
The K2 noise blanker works well on impulse noise - such as gasoline
engine ignition noise, but it will not do much for powerline noise.
One of the best checks for KNB2 operation is to turn the preamp on and
tap on the case of Q21 with a metallic tool such as a screwdriver.
Turning
I have had problems with powerline noise... and the K2 NB can have a
big difference.
If you have many multiple sources of noise, maybe not. But here is a
'youtube' of my noise blanker on off... with a 7800 scope picture
of the noise
Worked great on THIS example if powerline noise.
Sorry to have been away for so long. I've been busy.
My students (5th-8th grade) and I have finished the K2, finished the
KNB2, almost finished the KSB2 (I hope we will have that done today),
and haven't started on the KPA100 yet. K2 works great. Lovely receiver!
But, it appears that the
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