Funny how things move around: back in 1914-15 they could do 300wpm on spark transmitters and regularly worked 200wpm with 15kW stations up and down the west coast USA. It wasn't said as such but we know it as FSK. Machine to machine. Plus ca change...
David G3UNA > On 06 February 2021 at 18:11 Charlie T <pin...@erols.com> wrote: > > > I remember working at Microlog Inc (The OLD one in Gaithersburg MD that made > RTTY/CW video terminals) in the 80's. > No rigs at the time would function efficiently with on/off keying at that > speed, so we were experimenting with 300 WPM CW sent using the normal RTTY > method of 170Hz shift FSK. > It worked like a charm and our CW reader would copy perfectly at that speed > too. > Just about everyone in the company was a ham from the pres. on down, so we > played around with it on 2 meter FM using AFSK tones into the mike jack until > something new came along. > Other than just to see if it WOULD work, nothing more was ever done with it. > > 73, Charlie k3ICH > > > > > -----Original Message----- > From: elecraft-boun...@mailman.qth.net <elecraft-boun...@mailman.qth.net> On > Behalf Of David Gilbert > Sent: Saturday, February 06, 2021 1:04 PM > To: elecraft@mailman.qth.net > Subject: Re: [Elecraft] K3 - Maximum CW speed from manual key > > > I don't see that as being realistic. Per the normal definition of a Morse > "word" being the word "paris", 300 wpm means each dit would be no longer than > 4 msec. As best I can recall, the rise and fall of the K3 keying waveform > are each around 2.5 msec. I'm not at all an expert, but I suspect most > digital signal processing techniques would find that hard to differentiate. > > 73, > Dave AB7E > > > > > > On 2/6/2021 8:01 AM, Kurt Theis wrote: > > Greetings list! > > > > I searched the archives and other sources, but haven't found an > > answer, so I'll try here. > > I'm looking to find the maximum cw speed on my K3 (with new > > oscillators, serial 8xxx) when using a manual cw key plugged into the > > KEY jack on the back of the radio. > > > > I don't mean the internal keyer, or memories. I'm not using QSK, so > > that won't be an issue. The K3 is put into TX mode via an external TX > > switch, and keyed via the KEY jack. > > > > I'm hoping for speeds in excess of 300 WPM. Possible? > > > > ______________________________________________________________ > 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 Message > delivered to pin...@erols.com > > ______________________________________________________________ > 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 > Message delivered to d.cut...@ntlworld.com ______________________________________________________________ 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 Message delivered to arch...@mail-archive.com
