I see where you are coming from, but with a 2.1 why bother with the 1000 roofing filter (that's a question, not a criticism), since for casual operation the DSP should suffice. But since you DON'T have a 2.7/2.8 installed, how are you tricking the system? You telling it that the 2.1 is a 2.7? Why do you "have to remove one of the filters I want to use"?
In my lineup I have 250, 400, 1.8, 2.7, and 6. For casual CW I frequently use width at 800 (thus invoking the 1.8 roofer) around 500 Hz. For digital I use 2.7 width and let the computer watch the entire bandwidth. Some time ago I asked why one did not transmit CW through the narrow filter to limit bandwidth. I never quite got that answered. Some speculated that had to do with products of phase distortion in the narrow filters. I don't recollect an official answer. My personal *guess* at this point is that it has something to do with FCC type acceptance. 73, Guy. On Mon, Jan 25, 2010 at 8:29 AM, Bob Naumann <w...@w5ov.com> wrote: > The key problem is that when you want to use other than a 2.7 or 2.8 kHz > filter for receive, you must still tie up one of the remaining 4 filter > slots with either the 2.7 or 2.8 kHz filters in order to transmit. If there > were 7 or 8 filter slots in the radio, or one slot dedicated to transmit, > this would not be a problem. > > In my case, I have a 200, 500, 1000, 2.1 and 6 Khz filter installed. I don't > want to give up any of them, but because of this limitation, I have to > remove one of the filters I want to use. > > 73, > > Bob W5OV > > > > -----Original Message----- > From: elecraft-boun...@mailman.qth.net > [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Guy Olinger K2AV > Sent: Monday, January 25, 2010 7:05 AM > To: Jan Erik Holm > Cc: Elecraft > Subject: Re: [Elecraft] K3: Why can't I use my 1.8kHz filter for SSB TX? > > What would be the problem you were solving? > > On Mon, Jan 25, 2010 at 1:44 AM, Jan Erik Holm <sm2...@telia.com> wrote: >> I would like to use the 2.1 kHz filter for SSB TX. >> >> Elecraft any solution? >> >> Jim SM2EKM >> ---------------- > ______________________________________________________________ > 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 > > ______________________________________________________________ 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
