Hi Fred, I think this was the thread I previously saw on keying compensation for the KX3, including scope traces: http://elecraft.365791.n2.nabble.com/KX3-External-Key-Timing-Measurements-td7565401.html
73, Matt VK2RQ On 24/08/2013, at 7:26 AM, Fred Jensen <[email protected]> wrote: > Hmmm ... just when I thought I understood everything. :-) > > A number of years ago I built a keyer, can't remember if it was the K1EL chip > or not and I don't have it anymore. USB hadn't been invented. It suffered > from what I decided was a design defect in that it offered 2 dah-dit ratios. > 3:1 was all I ever used, I think the other choice was 4:1 and it really > sounded bad. I used it with a TS-830S. > > I also noticed that while the side-tone from the keyer sounded OK, listening > off the air seemed to have a "clipped" sound with dits and dahs both shorter > than I though was right. That was a need for Key Compensation? I assumed > the the -830 keying circuit just wasn't keying up instantly. > > I now have a USB Winkey. I use it only with N1MM, don't even have a paddle > plugged in, I use the K3 keyer with the paddle. CW WGHT=1.10 and CW QRQ is > OFF. 1.10 sounded good to me, probably just personal preference. I thought > that a WGHT>1.00 caused both the dits and dahs to lengthen slightly reducing > the inter-element space so a character still occupied the same time period. > I think that's what your reference link is telling me too [it's the same as > the User Manual for my USB WinKey] and I think that's what the K3 is doing. > > Listening to my K3 off the air, I can't discern any shortening of the > elements that I did with the -830. Why would I need Key Compensation in my > K3? I tried to measure it with the scope ... sort of inconclusive results > mainly because I don't know how to work it but if the K3 keying is clipping > anything off the beginning of the elements, I sure can't hear it. Am I > missing something? > > <smalldigression>An OT commercial op, when I asked, "Exactly what is > 'swing'?", said it was lengthening the dashes on the bug so the dash-dot > ratio was greater than 3:1, and that the resulting actual ratio was varied, > depending on what he was sending. I've always assumed he was > right.</smalldigression> > > 73, > > Fred K6DGW > - Northern California Contest Club > - CU in the 2013 Cal QSO Party 5-6 Oct 2013 > - www.cqp.org > > On 8/23/2013 6:51 AM, Hank Garretson wrote: >> It is very important to distinguish between Key Weighting and Key >> Compensation. >> >> See pages 15 and 16 here: http://k1el.tripod.com/files/WKUSB_QuickStart.pdf >> >> The K3 has Key Weighting. What it (additionally) really needs is Key >> Compensation. > > ______________________________________________________________ > 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
