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

 

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[Bob McGraw - K4TAX]

Has anyone else had or found this issue?   I found that it does exist
with mine.  Is there any solution?

73 Bob, K4TAX
K3S s/n 10163

 

On 10/30/2015 4:49 PM, Jim - N4ST wrote:

> It has a weird transmit dropout problem.
>
> On 6, 10 & 12 meters, there is a momentary loss of transmit audio every 15
> seconds.
>
> Occurs with DATA A and SSB modes.
>
> 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.

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[Don Wilhelm-4]

Yes, Wayne answered a few days ago.  It is caused by the way he samples
the PA Temperature.
It will be modified in an upcoming firmware release.

73,
Don W3FPR

On 11/6/2015 8:14 AM, Bob McGraw - K4TAX wrote:
> Has anyone else had or found this issue?   I found that it does exist
> with mine.  Is there any solution?
>
> 73 Bob, K4TAX
> K3S s/n 10163
>
>

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[Bob McGraw - K4TAX]

Thanks Don.   I suppose I didn't see Wayne's response.  In one way it is
nice to know it is not "radio unique".  In my examination, it appeared
to be a firmware issue, likely affecting all radios. Easy solution however.

73
Bob, K4TAX
K3S s/n 10163

On 11/6/2015 7:47 AM, Don Wilhelm wrote:
> Yes, Wayne answered a few days ago.  It is caused by the way he
> samples the PA Temperature.
> It will be modified in an upcoming firmware release.
>
> 73,
> Don W3FPR


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