After playing with CW filters, I have a few comments...
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When a single (not cascaded/compounded) 300 Hz or 500 Hz filter is selected, the ultimate rejection is not great. I can still hear a moderately strong station, 2 kHz away.? However, selecting a 400 Hz filter, which internally cascades 300 Hz and 500 Hz filters, results in excellent ultimate rejection.
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It would be nice to be able to select a lower center frequency. Personally, I prefer 400 Hz.
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73,
Steve, N2IC
