The "TUNE" tones from both applications (FLDIGI & WSJT-X) looks like a single frequency and is a pretty decent sine wave on the scope, although "pretty decent" is hard to quantify. It's more like the 500 Hz and its harmonics are beating with some process within the K3. The "pulsing " isn't apparent in the RF output power, at least as far as I can measure, so it may just be an audio artifact. Moving off those frequencies is certainly a work around for setting the audio drive level.
73, Brian, K0DTJ > On Aug 4, 2017, at 16:45, Wayne Burdick <[email protected]> wrote: > > Is it possible that a beat note between tones (and their harmonics) is what’s > modulating the ALC reading? If so, moving the tone slightly off the standard > pitch may be an acceptable workaround. > > 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]
