Posted by
Tom Hammond-3 on
Sep 25, 2006; 9:58pm
URL: http://elecraft.85.s1.nabble.com/More-information-Need-help-with-fluctuating-power-output-on-K2-tp386379p386387.html
Arie:
>Tested the noisblanker rubbing a screwdriver across the first RF amp
>Q21. Yep, makes a difference. Now waiting for a nice thunderstorm or some
>static rain :-)
Don't expect ANY help with atmospheric noises such as that which
comes from lightning and thunderstorms.
The NB (as with virtually ALL NBs) is designed to work on
short-duration repetitive pulses, such as sparkplug noise, the XYLs
hand mixer or sewing machine, line noise, etc.
My KNB2 DOES work on local electric fences, and it will often help to
reduce the corona on the antennas as a result of static build-up from
passing storms (because the corona discharge is fairly repetitive).
I find that my KNB2 generally works very well on those things for
which it was designed to work. Sometimes, if the actual STRENGTH of
the noise is low, it will not be enough to trigger the NB, however I
have, in some instances. been able to fix that by turning the PREAMP
on... making all signals (and noises) stronger, and up to a level
where the NB can detect the noise.
73,
Tom N0SS
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