If there were a 1.5kHz filter available, I might consider it. I'll be talking with INRAD about it. You can see what 1.5kHz is like by moving the DSP down to 1.5kHz, or even lower. You just won't have the crystal filter to keep nearby strong signals out of the DSP.
I think the 1.8kHz filter will be great for some time, until the entire world converts over to K3s with 1.8kHz filters. Then, you might need the advantage of 1.5kHz! In either case, though, the intelligible audio (the part you want to hear), is essentially identical between the 2.8 and 1.8, or even 1.5, bandwidths with the correct IF shift. I hope my post doesn't result in a disruptive run on 1.8kHz filters at Elecraft with a commensurate dearth of 2.1's in their stock (and, INRAD's)! 73, Ed - W0YK > -----Original Message----- > From: David Ferrington, M0XDF [mailto:[EMAIL PROTECTED] > Sent: Monday, 19 November, 2007 11:21 > To: [EMAIL PROTECTED]; Elecraft Reflector > Subject: Re: [Elecraft] K3 in SS Phone > > > Sorry, that should have been a choice between 1.5 & 1.8 ... > > On 19/11/07 19:19, "David Ferrington, M0XDF" > <[EMAIL PROTECTED]> sent: > > > Ed, I'm waiting for my K3 and I'm a phone man at present > (working on > > my Morse). > > I have a 2.8kHz and 400Hz on order. Reading your post, > maybe I should > > consider either a 1.8 or a 2.1 kHz filter too. > > Given the option, which would choose? > > > > Anyone else want to chip in too please. > > > > Kind of decision I couldn't make back in May. > > > > On 19/11/07 18:50, "Ed Muns" <[EMAIL PROTECTED]> sent: > >> On receive, I used the 1.8kHz crystal filter with the same DSP > >> bandwidth, although signals were quite intelligible down to 1.2kHz > >> and at 1.5kHz there wasn't much degradation from 1.8kHz. > As yet, the > >> K3 filter center > > -- > Trust in Allah, but tie your camel. -Arabic saying > > > _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
