[Elecraft] K3S Transmit Audio Dropouts

[Jim - N4ST]

I just received a new factory built K3S.

It has a weird transmit audio dropout problem.

On 6, 10 & 12 meters, there is a momentary loss of transmit audio every 15
seconds.

Occurs with DATA A, SSB modes.  CW is clean.

Problem occurs with internal or external sound card and even with the
built-in 2 tone test.

The audio dropout is repeatable and precisely formed as two 10 ms dropouts
separated by 15 ms and the pattern repeats every 15 seconds.

Been working with Elecraft support for 3 days, but they are running out of
ideas.

 

It really looks like a firmware bug given that the timing and waveform
characteristics are 100% repeatable and lack any randomness factor.

But, why just on the three upper bands?  Why are those bands unique?
(besides the incorporation of Preamp 2).

 

Has anyone else seen this?

Any ideas?

 

________

73,

Jim - N4ST