[Elecraft] K2 Noise blanker- is it working?

[Bill 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


wb2srf at juno.com 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
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