I was going to suggest an LC filter for non-critical work. If Elecraft would supply "replacement" carrier boards with the pin sockets either mounted or available it would be nice.
--- On Thu, 3/26/09, VE3NFK <[email protected]> wrote: > From: VE3NFK <[email protected]> > Subject: Re: [Elecraft] Width of AM filter > To: [email protected] > Date: Thursday, March 26, 2009, 7:42 PM > I hope I am not stepping on any toes - but I found someone > who had designed a 13Khz +/- filter with some toroids and > caps - incl variables to adjust and built two and they work > great in main KRX3 - > just confirmed again they give nice fidelity on AM - and I > can hear the 6khz filter click in when I reduce BW to 3... > low cost - fair bit of labour :-) > > 73 John VE3NFK > > > Jerry, > > The WIDTH control sets the final audio bandwidth, which is > limited to 5 > kHz in AM mode. But in AM mode, the crystal filter > bandwidth needed is > 2x the audio bandwidth, or 10 kHz in this case, because it > has to pass > both sidebands. To obtain this full bandwidth, you'd > have to have the > 13 kHz FM filter installed. The AM filter is only 6 kHz > wide (an > industry standard), and if that's the widest filter you > have, you're > actually getting only a little over 3 kHz of audio > bandwidth even if > you set the WIDTH control to max (5 kHz). > > 73, > Wayne > N6KR > > On Mar 26, 2009, at 11:23 AM, Gerard Jendraszkiewicz wrote: > > > Hello, > > > > I have K3 with KFLA-6K. I can only adjust the width to > 5.0 using the > > width knob on the K3. I use AM to listen to the AM BCB > and some SW. I > > remember getting a wider width in the past ?? Any > suggestions ? > > > > Thanks > > Jerry, KE9I > > > > > ______________________________________________________________ > > 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 > > > > > > --- > > http://www.elecraft.com > > ______________________________________________________________ > 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 > > > > -- > View this message in context: > http://n2.nabble.com/Width-of-AM-filter-tp2540204p2542146.html > Sent from the Elecraft mailing list archive at Nabble.com. > > ______________________________________________________________ > 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
