[Elecraft] K3 - Audio Drops

[Nolan Kienitz]

K3 s/n:  9013
MCU:  5.50
DSP:  2.87
FPF:  1.25

KIO3B upgrade installed:  06/09/16

Filters in slots 2-4:  6K, 2.8K, 400, 200

No Subreceiver.

I use the Log4OM application and since the installation of the KIO3B the
audio level drops very low when the Log4OM application is shut down. This
happens about 75% of the time when operating. I do not recall this happening
before I updated the module earlier this summer.

I've used both the USB and the Serial links in testing and I get the same
response no matter which communications path I use.

All updates are current in Log4OM and I've updated and tested the OmniRig
interface that is preferred to use within Log4OM.

I've worked with Log4OM support and have not yet been able to narrow to a
solid reason ... yet.

When the audio drops I can immediately restore the prior level by barely
touching/moving either the Shift or Width knobs. Operating the XFIL key also
brings the audio back up.

Appears some command is telling the filter to reduce width to 0.

I've done trace and capture of signals between my laptop and the K3 when
Log4OM is operating, but there does not appear to be any solid clue with
that captured data either. I used USBPCAP and Wireshark to capture/view the
USB traffic data.

FWIW, I just sent a support request to K3 Elecraft yesterday so should hear
back once they have a chance to digest the data I sent to them.

Thought I would post here just in case someone else may have some off hand
suggestions.


73 - Nolan Kienitz, KI5IO







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