I guess this thread raises the question: Why does this FW remain on the "Top Secret" list...:-)
just askin' Gary On 14 February 2013 11:06, Mark n2qt <n...@verizon.net> wrote: > I had missed that this wasn’t discussed on this reflector, so first a > little history > > At the end of December, on the RTTY reflector, Andy K0SM/2 produced > measurements showing that the > use of FSK, which had been the ‘gold standard’ for generating RTTY was > actually not as spectrally efficient > as correctly adjusted, shaped AFSK generated RTTY. This was shown in his > write-up posted at > > http://www.frontiernet.net/~aflowers/k3rtty/k3rtty.html > > Note that this does NOT indicate that there was any sort of problem with > the K3, just that there was a chance > to be better. Other manufacturers also have this same chance to improve. > > A little later, Ed, W0YK, also known as P49X in many contests, announced > that he had successfully used > experimental DSP firmware from Elecraft in the BARTG rtty contest. > > “The K3 DSP firmware engineer coded a wave-shaping filter that narrows > the transmit bandwidth similar to > what their AFSK filter provides. The resulting spectrum image looks like > the better, i.e., narrowest, of the > images in K0SM's recent work.” > > Elecraft then allowed Ed to share this firmware with others who were > interested in trying it, which is how I got it. > > As anyone who was in the WPX RTTY contest this past weekend knows, > anything that can help reduce the > unnecessary interference from overly wide transmissions is more than > welcome. It is great that Elecraft has > reacted so quickly to this opportunity. (Would we expect anything less > from these guys??) > > Mark N2QT/WE4M > > From: Stephen Prior > Sent: Wednesday, February 13, 2013 3:22 AM > To: Mark > Cc: elecraft@mailman.qth.net > Subject: Re: [Elecraft] K3 Reduced BW FSK > > Mark, > > You will have to enlighten us (well, me anyway) - just what pre-beta > software are you referring to? > > 73 Stephen G4SJP > > > > On 13 February 2013 04:10, Mark <n...@verizon.net> wrote: > > Just a report that I used the pre beta low bandwidth fsk software on > both k3s during the > WPX RTTY contest. Made over 1900 low power contacts, with no apparent > problems > (As expected). As close as some stations felt comfortable operating > next to me, it looks > like it helps. > > With the ever increasing popularity of rtty contesting, improvements > like this helps > us all. > > > Mark. N2QT/WE4M > ______________________________________________________________ > 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 -- *Gary - VK1ZZ Skype: Gary.VK1ZZ Motorhome Portable The Shack* *Elecraft K3 P3 Panadapter KPA500FT KAT500FT** KX3-K * ______________________________________________________________ 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
