Phil, The K2 variable filter can be set for any width that you desire It is a 5 crystal Cohn filter whose design width is about 400 Hz. The CW filter width defaults are 1.50 kHz, 700 Hz, 400 Hz and 100 Hz, but there is no reason you have to stay with the defaults. There are 4 CW filter widths that can be chosen. There are also 4 widths for the SSB filter set and 4 for the RTTY filter set.
The variable filter is pretty flat out to about 1.6 or 1.7 kHz, but then it begins to get a bit "ragged" - still it is quite usable for SSB reception, but I would not want to see a SSB signal transmitted through it - that is where the 2.4 kHz SSB filter on the KSB2 board comes in. It is a fixed width and has 7 crystals. 73, Don W3FPR On 2/8/2011 4:48 PM, Phil Hystad wrote: > Don, > > I still use a fairly wide filter (1 KHz to 1.5 KHz) on my K3 when I am > hunting for CW signals or listening to broad activity. I have the P3 also > that helps out a bit but I usually do not close down my filter until I > establish contact and have narrowed down to the other operator. Then I will > typically narrow down to about 350 Hz unless there is heavy activity causing > QRM and then I will go even further. > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
