[Elecraft] [K3] AGC and headphone question

[James Sarte]

Hi Lyle,

Yes, that is exactly the case.

CONFIG:SPKR+PH is set to OFF.

When inserting headphones, speaker output is disabled as is expected.  When
deactivating AGC, then speaker turns back on.

Very strange.  Will contact support in the AM.

Mni tnx es vy 73 de James K2QI

On Wed, Aug 4, 2010 at 10:43 PM, Lyle Johnson <kk7p at wavecable.com> wrote:

>  Hello James!
>
>  Thanks for the reply.  I was incorrect; the headphones don't cut out when
> AGC is turned off like I initially wrote, BUT, the speaker still does come
> on even though headphones are plugged in.  I thought that was rather odd.
>
>  So you think its a hardware issue?  I'll give support a buzz in the
> morning, but would also like to hear your thoughts if you have the time.
>
>
> The DSP controls the speaker coming on and off.  The state of AGC should
> have no bearing at all on the speaker being on or off.  If the
> CONFIG:SPKR+PH is ON, then off course the speaker won;t mute with the
> insertion of the headphones, but I understand from your message that if AGC
> is ON, the speaker is muted when the headphones are inserted.  It is only in
> the case of AGC OFF that inserting the headphones does not mute the speaker.
>
> I just checked here in CW and SSB and AGC ON|OFF has no effect on the state
> of the speaker.
>
> I don't know that it is a hardware problem, but perhaps support has heard
> of this before and knows the cure.
>
> 73,
>
> Lyle KK7P
>
>
>  73 de James
>
> On Wed, Aug 4, 2010 at 9:01 PM, Lyle Johnson <kk7p at wavecable.com> wrote:
>
>>  Hello James!
>>
>>
>>  I turned off AGC today while listening through headphones, and noticed
>>> that it cut the output of the headphones but brought the internal speaker
>>> back on line.  This was the case even with the volume turned all the way
>>> down.  Just wondering if this is normal?
>>>
>>
>>  No, it isn't.  SPKR is not related to AGC.  There is an AF limiter that
>> cuts in if AGC is off, this is user adjustable, see the manual or release
>> notes for details.
>>
>> Regarding the speaker issue, please contact support.
>>
>> 73,
>>
>> Lyle KK7P
>>
>>
>
>


-- 
73 de James K2QI