Interesting! Sounds useful on 6m, for example, when running a contest SSB above 125 and there's a difficult Q where the guy's having trouble with an exchange element. Generally running an amp, so overshoot would be a problem.
Thanks for info. 73 Josh W6XU Sent from my mobile device > On May 28, 2018, at 11:41 AM, Dan Maase <dfma...@aol.com> wrote: > > > Josh: > > This configuration permits sending SSB as well as CW in one mode (SSB). CW > frequency is offset from SSB frequency by the value of configured CW tone? > This is sometimes called "cross-mode" in non-Elecraft nomenclature. > Useful to continue a SSB conversation of QSB reduces intelligibility. > Also can check configured power with a key press without messing with "Tune" > setting. > > 73, > Dan > AC6DM > > What is "SSB+CW mode"? > > 73, > Josh W6XU > > Sent from my mobile device > > > On May 28, 2018, at 9:44 AM, Dan Maase via Elecraft > > <elecraft@mailman.qth.net> wrote: > > > > > > I have just attempted the K3 SSB +CW configuration for the first time. > > Unfortunately, behavior is not quite as expected; I experience a > > substantial CW carrier overshoot on first key press and after a subsequent > > mode change. (Mode change can be a band change or an Operate/Standby > > change when running with the KPA500). > > > > The overshoot is on the order of 10 to 40% depending on the power level > > setting. > > > > When running the K3 barefoot at 100 watts the overshoot is on the order of > > 110 watts measured with a W2 in peak reading mode. > > > > When running the KPA500 set for 500 watts (approx 27 watts drive), the KPA > > output overshoot has been observed to exceed 700 watts triggering a high > > power fault. The only recourse is to reduce drive setting to the KPA500 to > > an output level of 400 watts or so where the output power overshoots to on > > the order of 550 watts. > > > > Holding down the key after the overshoot, the power settles to the selected > > value in a second or so (assuming KPA power is set such that no fault > > occurs). > > > > Subsequent CW key presses produce power output at the selected value without > > overshoot, regardless of momentary or continuous key press. > > > > Also observed is difficulty setting power on key down, particularly with the > > KPA500. Power setting is "jumpy" when changing power, after the overshoot > > has stabilized. It seems as if when increasing power, it overshoots the set > > value, then drops to the set value. > > > > The issue is observed on all bands and on upper or lower sideband. > > > > I've performed TX Power Calibrate several times with reported success, but > > no change in overshoot behavior. > > > > When in normal CW mode, there is no overshoot and the power adjustment is > > smooth and stable. > > > > The SSB +CW mode would be quite useful if it was stable, but I am uneasy > > using it as currently implemented. Any comments or ideas are welcome. > > > > K3 is S/N 4457 > > Firmware version is 5.62 > > FPF 1.26 > > DSP 2.88 > > > > 73, > > Dan AC6DM > > > > > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
