If you are using the internal keyer of the K3 (or KY commands), with CW QRQ OFF, there is no timing distortion of transmitted CW elements for any value of CONFIG:TX DLY, as long as VOX is used, and the PTT line is not closed with a footswitch. The internal keyer compensates for the increased TX delay. This works with both full break-in (QSK) and semi break-in.
CW speeds above 37 WPM are badly distorted by jitter for both internal and external keying if you do not have a K3S or K3 with KSYN3A upgrade and CW QRQ mode is OFF. As noted previously, if you want a true TX DLY of 10 ms, set CONFIG:TX DLY to 13 (not 10). If you are using external keying from a WinKey or via serial port with CONFIG:PTT-KEY = OFF-DTR, with VOX ON, QSK OFF (semi break-in) and no PTT line closure, the first transmitted element will be truncated by the TX DLY setting (minus 2 or 3 ms assuming you have a K3S or K3 with KSYN3A upgrade). If using full break-in (QSK), *all* trnasmitted elements will be truncated for any value of TX DLY above 008 with external keying. Tcompensate for that, as mentioned previously, increase the length of every externally-keyed element by a fixed amount, using the WinKey "Keying Compensation" and/or "1st dit extension" setting. In the microHAM MK2R+ Router, it is now called "R/T delay", located on the Router's PTT tab (not the WinKey tab). None of this applies if you set CW QRQ ON. The TX DLY drops to about 4.5 ms, and CONFIG:TX DLY is ignored. None of this applies if your keyer or software holds the PTT line closed for the duration of a CW message. I have not made any measurements on an older unmodified K3 yet. 73, Bob, N6TV On Mon, Jun 11, 2018 at 12:36 PM, Lee Trout <[email protected]> wrote: > With the talk on using older amps, it seems I recall there was distortion > introduced on CW if the delay was set to the higher end? Has that problem > been solved via firmware? > > Sorry if this has already been answered, but I could not find anything on > it. > > 73, Lee > ______________________________________________________________ > 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] > ______________________________________________________________ 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]
