I found 8 pole 400 Hz and 5 pole 200 Hz as a great combination in last CQ 160m. 400 Hz filter was to wide most of the time.
73 Robert, S57AW Sent from iPhone Na dan 9. feb. 2011, ob 02:30, Wayne Burdick <[email protected]> je zapisal: > On the other end of the spectrum: If the going is really tough, you > might consider our 200 Hz, 5-pole filter. It's a favorite of CW and > data-mode operators who routinely have to dig for weak ones between > monster signals in CW and data modes. > > 73, > Wayne > N6KR > > On Feb 8, 2011, at 11:07 AM, Scott Ellington wrote: > >> QRM levels are generally much lower outside EU or NA. Years ago, I >> did a CW contest from ZL with a TS-50 and a single 500 Hz filter. >> That would have been woefully inadequate in NA, but it was fine >> there. So, the question I would ask is whether anyone in a non-EU >> or NA QTH has compared the K3 400 Hz filter with narrower DSP with >> the 250 Hz filter. Surely, the 400 Hz fliter +DSP would be far >> superior to that old TS-50, so I would expect it to be fine. Note >> that the K3 "250 Hz" filter is really about 370 Hz wide, compared to >> 435 for the "400 Hz" one, so the difference isn't that great, anyway. >> >> Perhaps Jorge can check this out in the next contest: Set the "I" >> filter to 400 Hz, and the "II" filter to 250 Hz, both with the 400 >> Hz xtal filter. I'd be interested in the results. >> >> 73, >> >> Scott K9MA >> >> >> >> On Feb 8, 2011, at 11:49 AM, Jorge Diez - CX6VM wrote: >> >>> Hello, >>> >>> >>> >>> I have both KFL3A-400 (400 Hz 8-pole) and KFL3A-1.8K (1.8 kHz 8- >>> pole) >>> filters in my K3. >>> >>> >>> >>> If I add a KFL3A-250 (250 Hz 8-pole) filter I will notice it better >>> to use >>> in contests? Or with the 400Hz is enough? Notice I am not in USA >>> or EU >>> with strong stations near me, I don´t have the QRM this big >>> populations >>> have, trying to reduce the splatters. >>> >>> >>> >>> 73, >>> >>> Jorge >>> >>> CX6VM/CW5W >>> >>> k3 #4077 >> >> Scott Ellington >> Madison, Wisconsin >> USA >> >> >> >> ______________________________________________________________ >> 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 ______________________________________________________________ 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
