[Elecraft] CQ Contest

[Ron D'Eau Claire]

Richard, K5BWV, wrote:

Echoing others on this thread, the DSP at 250Hz with the 250Hz 8 pole 
filter was used most of the time.  Sweet!  ...I also did notice many 
signals had monstrous sidebands due to 'key clicks'.

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Putting a strong signal near the edge of a filter bandpass can create those
"clicks" in your own receiver. Generally, the sharper the filter (steeper
the skirt) the stronger the clicks that may be produced. 

Ron AC7AC