Another reason my next rig is the K4! Sent from my iPad
> On Nov 4, 2019, at 6:22 PM, N6KR <[email protected]> wrote: > > We went to great lengths to create an ideal sigmoidal (raised cosine) > rise/fall characteristic for our CW keying envelope. It is set at > approximately 5 ms and will not be shortened for any reason. Elecraft rigs > don't click. > > We also ensure that ALC never interferes with the CW keying waveform. During > rise and fall, ALC is open-loop, allowing the characteristic curve to be > presented to the output stages. > > The result of all this is the narrowest CW keying bandwidth possible > consistent with crisp on-the-air sound. > > 73, > Wayne > N6KR > > > >> On Nov 4, 2019, at 12:21 PM, Dan Atchison via Groups.Io >> <[email protected]> wrote: >> >> I am hoping that the K4, like its predecessor the K3(S), does NOT give a >> user the ability to change its CW rise times. >> >> I believe the K3 is designed for a 5ms rise. Many, if not most, other >> manufacturers allow as little as 1ms resulting in CW signals that reach >> beyond 1kHz of bandwidth by creating horrible key-clicks. Indeed, their >> "default" values can be too short. To what end? Unscrupulous users setting >> it so their clicks help keep their run frequency clear? Terrible to think >> that but I have heard some station owners admitting same. >> >> Last weekend's CWSS had many, many horrible key-click stations - some from >> notable contesters. I realize that things other than a CW rise time can >> give cause to key-clicks (antenna connections, hot-switching, etc.), but >> newer radios shouldn't be the culprit - yet they can be because of >> manufacturer's oversight (or under-thought). >> >> I've never heard of a short CW rise time being an advantage other than to >> create havoc. There is a happy medium. >> >> Dan - N3ND >> >> >> > > > -=-=-=-=-=-=-=-=-=-=-=- > Groups.io Links: You receive all messages sent to this group. > > View/Reply Online (#247): https://groups.io/g/Elecraft-K4/message/247 > Mute This Topic: https://groups.io/mt/41455121/929648 > Group Owner: [email protected] > Unsubscribe: https://groups.io/g/Elecraft-K4/leave/3980533/1856084209/xyzzy > [[email protected]] > -=-=-=-=-=-=-=-=-=-=-=- > ______________________________________________________________ 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 Message delivered to [email protected]
