[Elecraft] WSJT-X and K3S ALC

[Bob McGraw K4TAX]

While mentioned earlier, the effort to set the correct audio level such 
that the ALC bargraph shows 4 bars solid and the 5th bar blinking has 
been a challenge to many.  I noted today that did happen after I changed 
a few things around at my station.  Further investigation concluded that 
the audio tone used during the TUNE routine in WSJT-X and FT-8 mode was 
1500 Hz.   Changing this to a lower frequency, I actually used 1490, the 
effect was not observed.

I attribute this observation at 1500 Hz to be some what of a cyclic 
event between the ALC display timing in the K3S and the audio 
frequency.  I'd suggest if you struggle to set the levels for 4 bars 
solid on and the 5th blinking, check the audio tone frequency and move 
it a few Hz up or down.

73
Bob, K4TAX
K3S s/n 10163