We’re thinking that the first CW character is shortened by a longer delay (QSK), and that is the issue...not that a longer delay is prevented? Is that what I’m reading? QSK with a foot switch sounds interesting to watch...
Chuck KE9UW Sent from my iPhone, cjack > On Jun 8, 2018, at 9:02 AM, Clay Autery <[email protected]> wrote: > > Mmmmm.... even without a firmware change, my TX DLY already has the range > from "NOR 8ms" to "020" (8-20 ms). Granted, that 20ms MAY be somewhat > shorter than 20ms, as described by Wayne regarding the 8ms "NOR" setting. > I suspect that they will now push this up in the queue of things to mod in > the next firmware release. > > Strange (to me) that so many find foot switch use in CW such a non-starter. > Since I uses one exclusively in SSB, I guess it is only natural for me to use > one in CW... > > 73, > > ______________________ > Clay Autery, KY5G > (318) 518-1389 > >> On 08-Jun-18 05:22, Igor Sokolov wrote: >> Wayne it is a pity that TX delay setting affects CW timing. Changing TX >> delay from default even one or two steps makes CW much worth. Can you figure >> out a way to make CW timing independent from TX delay? With 5 ms TX delay >> working in many contests I already had to change a pair of relays in the >> amplifier. 10-12 ms would be fine for me. 20 ms will probably suit the >> majority of users. But 5 ms is way too fast and unfortunately cannot be >> altered without spoiling CW sending. I know that I could build external >> sequencer but this does not look neat enough especially for portable field >> operation. Every other radio I had allowed TX delay adjustment to at least >> 20 ms. >> >> 73, Igor UA9CDC >> >> 08.06.2018 4:43, Wayne Burdick пишет: >>> It has come to our attention (thanks to N7YK and N6TV) that the default >>> value of CONFIG:TX DLY, 8 ms, may actually be closer to 5 ms. >>> >>> The associated T/R control firmware hasn’t changed in a long time, so >>> hopefully there aren’t many users affected (or we would have heard about >>> it). The shorter delay may be related to the improved KSYN3A synth, which >>> switches faster than the original. We’re looking into this, and will update >>> the displayed value to reflect the actual value. >>> >>> Details: >>> >>> When using a QRO amp with the K3, the KEY OUT line from the radio is used >>> to key the amplifier, setting it up to receive RF. Since the K3 has very >>> fast QSK, the amp’s T/R control circuitry has to be similarly fast. >>> >>> Those of you who are using KPA500s and KPA1500s need not be concerned about >>> the K3’s fast QSK speed, since our amps use PIN diode T/R switching. They >>> can easily keep up with the K3 at any code speed and with the default >>> setting of the CONFIG:TX DLY menu entry. >>> >>> However, some other amps, especially older ones, use slow T/R relays. If >>> the transceiver generates RF before the amp is ready, this might result in >>> key clicks. >>> >>> (In practice there’s a bit of a grace period because the RF keying envelope >>> rises very slowly. It’s a "raised-cosine sigmoid," resulting in the >>> transceiver itself having incredibly clean keying sidebands. See K9YC white >>> paper on this topic.) >>> >>> If you suspect your amp has a slow T/R relay, you should do a listening >>> test, or better yet have someone else listen from a good distance. If you >>> (or they) hear any evidence of clicks, increase the value of CONFIG:TX DLY. >>> >>> Use the lowest setting that eliminates the clicks. CW keying at higher code >>> speeds may be affected if the value is too high. Other modes not using fast >>> QSK will generally be unaffected (voice and data). >>> >>> An alternative to increasing TX DLY is to use a foot switch, as do many >>> users of old amps regardless of transceiver type. >>> >>> 73, >>> Wayne >>> N6KR > > ______________________________________________________________ > 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]
