K2 Noise blanker- is it working?

[wb2srf]

The best way I have used to test the effectiveness of noise blanker is
try to use the radio in a house with a common incandescent lamp dimmer
nearby the antenna connection. Use a wire antenna placed near the lamp or
wiring of the dimmer circuit if necessary to increase the coupled noise.

The power line frequency zero crossing pulse width modulator (severe
contant buzzing sound) of the lamp dimmer noise will be almost completely
supressed if the noise blanker circuit is working properly

GL 73,
Bob Johansen WB2SRF
K2 S/N 5622
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[Bill VanAlstyne W5WVO]

Another good source of in-home switching hash is the ubiquitous external
low-voltage halogen lamp power supply. In my experience, some of them are
completely quiet, some of them are anything but. If you have one of the
latter, though, you probably already know that.  :-)

Bill / W5WVO


[hidden email] wrote:

> The best way I have used to test the effectiveness of noise blanker is
> try to use the radio in a house with a common incandescent lamp dimmer
> nearby the antenna connection. Use a wire antenna placed near the
> lamp or wiring of the dimmer circuit if necessary to increase the
> coupled noise.
>
> The power line frequency zero crossing pulse width modulator (severe
> contant buzzing sound) of the lamp dimmer noise will be almost
> completely supressed if the noise blanker circuit is working properly
>
> GL 73,
> Bob Johansen WB2SRF
> K2 S/N 5622
> _______________________________________________
> Elecraft mailing list
> Post to: [hidden email]
> 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 

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