Hi guys,
On 40 the band is very busy over here in Europe. Since my CW skills
are not the best, a good filter makes it easier for me to "decode"
Morse in a crowded band. Now I have a 400 8 pole and I think a 200 Hz
5 pole or 250 Hz 8 pole will improve the rx and possibly take some
workload of the DSP?
But which one to choose, how does one weigh the importance of steeper
skirts against a filter with less bandwidth? Why doesn't a 200 Hz 8
pole exist, is there a problem in group delay time, or ringing?
vy 73 Eric PA3CEV
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