Barry Simpson wrote: > > Has anyone else noticed that there is a substantial difference in the mark > space ratio of the keying dependent on whether you operate QSK/semi break > in > compared with manual transmit, eg push the transmit button on the front > panel or use a foot switch to enter transmit. > > > 73 > > Barry VK2BJ > >
Barry, Character shortening in QSK seems to be common in many radios but is normally a function of qsk v semi break-in as well as manual ptt. Most good external keyers offer 'keying compensation' in msecs to offset this; my FT990 needed as much as 8ms extra on the characters to give a 1:1 dit ratio in qsk v semi break-in. Just done a quick 'scope check here using my Microham cw keyer and the results are 'inconclusive'. In qsk the space is actually slightly less if measured from the end of the fall to the start of the rise, but slightly more if the dit is measured across the 'top' ignoring the rise/fall time. I forgot to check using the internal keyer but this seems pretty good to me. Having said all that I see that I have configured my Winkeyer with 3ms 'keying compensation' which was done on the basis of it sounding a little choppy previously. 73, Stewart Rolfe, GW0ETF (K3 145) -- View this message in context: http://n2.nabble.com/K3-Keying-tp840393p840685.html Sent from the Elecraft mailing list archive at Nabble.com. _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
