Ooops, typos are us. Some of the responders have commented that the -6dB width of the 250 Hz filter is not that much smaller than the 400 Hz filter width, which is true. T
Duncan Carter wrote: > Just to add further confusion to the cw opinions, I currently have the > 250 Hz 8 pole, which I like as it allows me to work very close to strong > locals including those with key clicks, and I plan the purchase the 8 > pole 500 Hz Inrad filter on New Years Day. Some of the responders have > commented that the -6dB width of the 250 Hz filter is not that much > smaller than the 400 Hz filter width, which is true. The problem is > that the response on either side of the peak of the 250 Hz filter isn't > symmetrical, at least mine isn't, I assume the result of working with > real, physical, hardware.. One side matches well with the 250 Hz dsp > filter width but the other side is wider and sets most of the overall -6 > dB with if the dsp filter is set to a wider bandwidth. > > Dunc, W5DC > > > DM4iM wrote: > >> Elecrafters, thanks for all the input. >> I had many replies, personal mail or via the reflector. >> >> To sum it up: >> >> Matched filters are important for diversity. >> >> 8 votes for the 1.8khz, 4 for the 2.1 ssb filter for contesting. >> Some use the 1.8khz ssb filter for cw, with the dsp set to narrower >> bandwith. I think i will order one of those, it makes sense to use it >> for cw-operation on a quiet band and in ssb contests when things get rough. >> >> The 200hz and 250hz cw filters got an equal number of votes, you left me >> alone on this ;-) >> >> The expense on 2 matched 5 pole or 2 8-pole filters is about the same, >> so the criteria here is performance. >> >> May i call for a run-off? >> >> Thanks to all es HNY >> >> Martin >> >> >> > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
