[Elecraft] [Elecraft_K3] New K3 Beta Release: APF for CW, "Fast Monitor" & improved TX gate for voice modes

[Nate Bargmann]

* On 2010 06 Nov 06:15 -0500, dalej wrote:
> I just loaded this beta version 4.18 and now I get loud crackling from the speaker when tuning though the APF filter, also, the audio goes away.  I uploaded the firmware though the P3 twice, once power on P3 and the second time power off with the same results.  I will next try loading the firmware directly into the K3.  If I have the same result, I will then revert back to the previous version, beta 4.17, which worked fine including the power out.  

I take it you are tuning the APF with the SHIFT control?

Ouch!  I just replicated your issue on my K3!  Once I tuned the APF
above 1 kHz the crackling begins.  During this time the APF function
disappears and with each step on the display a loud CRACK! is heard in
the speaker.  Once I tune the APF below 270 Hz the CRACK! goes away and
the APF is restored. 

At 1 kHz I hear a loud POP! and then the CRACK! occurs for each step as 
the knob is advanced to the right although the displayed APF frequency
remains at 1 kHz.  At 270 Hz I hear a BOOP! and APF is restored.  I've
done this several times as I've typed this message.  When the APF is in
the crackle mode, turning it off and then on does not change the crackle
state, in fact more crackle is heard upon reactivation.  Powering off
the K3 while in "crackle" mode kills the crackle and APF resumes its
function.

I am running MCU 4.18, DSP 2.67, and FPF 1.14 on K3 #4762.

HTH,

73, de Nate >>

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