K3 -- Strange speaker problem

[Joel R. Hallas]

Tonight, when I turned on my early (sn 431), but upgraded to current, K3, I
was surprised to find I had no speaker audio with either internal or
external speaker(s). My first thought was that I had somehow fried the
speaker AF amp chip. But then I found that the speaker audio worked fine if
the CONFIG were set to SPKR + PH = yes. That would seem to rule out the
speaker amp as the problem.

Anyone experience this, or have any ideas?

Thanks much!

Regards, Joel Hallas, W1ZR




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[Ken Winterling]

Joel,

I don’t own a K3 so I am not familiar with all of the audio output settings
but is it possible you have a set of headphones plugged in that is
disconnecting the speaker? If not, maybe a dirty headphone jack?

Ken
WA2LBI

On Tue, Apr 2, 2019 at 20:44 Joel Hallas <[hidden email]> wrote:

> Tonight, when I turned on my early (sn 431), but upgraded to current, K3, I
> was surprised to find I had no speaker audio with either internal or
> external speaker(s). My first thought was that I had somehow fried the
> speaker AF amp chip. But then I found that the speaker audio worked fine if
> the CONFIG were set to SPKR + PH = yes. That would seem to rule out the
> speaker amp as the problem.
>
> Anyone experience this, or have any ideas?
>
> Thanks much!
>
> Regards, Joel Hallas, W1ZR
>
>
>
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

--

Ken
WA2LBI

Sent from one of my mobile devices
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[hbjr]

I'm a new K3s owner as of October, but I'll take a stab!  I leave phones
plugged in to the back of the rig all of the time and an external speaker
all of the time.  My settings are SPKRS = 2 and SPKR+PH =yes.

Hope that helps!

Hank
K4HYJ

-----Original Message-----
From: [hidden email] <[hidden email]> On
Behalf Of Joel Hallas
Sent: Tuesday, April 2, 2019 8:44 PM
To: [hidden email]
Subject: [Elecraft] K3 -- Strange speaker problem

Tonight, when I turned on my early (sn 431), but upgraded to current, K3, I
was surprised to find I had no speaker audio with either internal or
external speaker(s). My first thought was that I had somehow fried the
speaker AF amp chip. But then I found that the speaker audio worked fine if
the CONFIG were set to SPKR + PH = yes. That would seem to rule out the
speaker amp as the problem.

Anyone experience this, or have any ideas?

Thanks much!

Regards, Joel Hallas, W1ZR




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[Jim Brown-10]

Hi Joel,

It sounds like you have phones plugged in somewhere. The traditional way
of wiring rigs is that plugging in phones mutes the speaker (usually
they're powered from the same output stage). The K3 has separate output
stages for spkr and cans, and the switching is done by logic. Most of us
who plug boom mic headsets into the rear panel assign SPKR + PHONES to
one of the PF keys -- I use PF2. SPKR+PHONES is a toggle, so it either
activates or de-activates muting of the speaker.

This is documented in the part of the manual that describes the menu
system.

73, Jim K9YC

On 4/2/2019 5:44 PM, Joel Hallas wrote:
>   I
> was surprised to find I had no speaker audio with either internal or
> external speaker(s). My first thought was that I had somehow fried the
> speaker AF amp chip. But then I found that the speaker audio worked fine if
> the CONFIG were set to SPKR + PH = yes. That would seem to rule out the
> speaker amp as the problem.


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