[K3] Main/Sub LIN OUT audio levels unbalanced

[Nate Bargmann]

I am working with my K3 to record audio from the Line Out jack into the
soundcard.  I am finding that the Sub receiver audio is about 8 dB
greater than the Main receiver audio per the input meter in Audacity
(this is with the antenna connected to a 50 ohm load).  My CONFIG:LIN
OUT is set to NOR 007.  My transmit audio is of equal levels on both
left and right channels per Audacity, which I think exonerates the audio
chain into the PC.  I have option 3 of CONFiG:LIN OUT set to T= 020
(nice addition which allowed me to lower the TX audio presented to the
soundcard).

I have noticed that since installing the Sub receiver last August that
through the speakers (two Realistic Minimus 3.5 models) that the Sub
audio is always louder than the Main audio.  Of course, I adjust the
volume controls to even it out as needed, however, I want to keep the
recording level constant, so I'd like to avoid setting CONFIG:LIN OUT to
=PHONES.  A few weeks ago I borrowed an XG3 from a local and did the
receive calibration on all bands but that made no difference.

Is there a method available to balance the audio levels between the
receivers so the recordings I make with Audacity will be balanced?

Thanks!

73, Nate, N0NB

--

"The optimist proclaims that we live in the best of all
possible worlds.  The pessimist fears this is true."

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[Nate Bargmann]

No ideas at all regarding this or did I fail to explain the issue I am
seeing well enough?

73, Nate, N0NB

--

"The optimist proclaims that we live in the best of all
possible worlds.  The pessimist fears this is true."

Web: http://www.n0nb.us  GPG key: D55A8819  GitHub: N0NB
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[Scott-2]

Nate,

Nate wrote:
..."I have noticed that since installing the Sub receiver last August
that through the speakers (two Realistic Minimus 3.5 models) that the
Sub audio is always louder than the Main audio."

Ok I'm betting it's the same through your headset (if you use one) and
you have the volume controls for both the main and sub "matched".  So
here is my best guess:

Check the NR and ATT are set the same for both the Main and Sub
receivers.  Sounds like you have NR or ATT set ON for the Main and NOT
the sub receiver.  If these settings are not the same the audio will be
noticeably different on the main and sub receivers.  BSET is your
friend.  Not sure if NR and ATT settings translate to Line Out audio
levels... but maybe.

Scott
AD5HS

On 2/22/2019 12:28 PM, Nate Bargmann wrote:
> No ideas at all regarding this or did I fail to explain the issue I am
> seeing well enough?
>
> 73, Nate, N0NB
>
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[Oliver Grossmann]

Dear Nate,
I had the same some month ago and it costs me EEINIT and new Firmware without success. Than I had the idea to check RF Gain. The RF knob of Main and sub were on different positions.

BR
Olli

> Am 23.02.2019 um 05:54 schrieb Scott <[hidden email]>:
>
> Nate,
>
> Nate wrote:
> ..."I have noticed that since installing the Sub receiver last August that through the speakers (two Realistic Minimus 3.5 models) that the Sub audio is always louder than the Main audio."
>
> Ok I'm betting it's the same through your headset (if you use one) and you have the volume controls for both the main and sub "matched".  So here is my best guess:
>
> Check the NR and ATT are set the same for both the Main and Sub receivers.  Sounds like you have NR or ATT set ON for the Main and NOT the sub receiver.  If these settings are not the same the audio will be noticeably different on the main and sub receivers.  BSET is your friend.  Not sure if NR and ATT settings translate to Line Out audio levels... but maybe.
>
> Scott
> AD5HS
>
>> On 2/22/2019 12:28 PM, Nate Bargmann wrote:
>> No ideas at all regarding this or did I fail to explain the issue I am
>> seeing well enough?
>> 73, Nate, N0NB
> ______________________________________________________________
> Elecraft mailing list
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[Ken Wagner K3IU]

One thing that I don't see mentioned is that the gain
settings for the for the crystal filters in the two
receivers may be resulting in somewhat different gains over
the signal path in the main and Sub Rcvrs. I notice some
differences between the main and sub rcvrs which varies if I
change the gain settings on the filter being used. 73, Ken K3IU
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


On 2/22/2019 1:28 PM, Nate Bargmann wrote:
> No ideas at all regarding this or did I fail to explain the issue I am
> seeing well enough?
>
> 73, Nate, N0NB
>

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[Nate Bargmann]

* On 2019 22 Feb 22:55 -0600, Scott wrote:
> Nate,
> Check the NR and ATT are set the same for both the Main and Sub receivers.
> Sounds like you have NR or ATT set ON for the Main and NOT the sub receiver.
> If these settings are not the same the audio will be noticeably different on
> the main and sub receivers.  BSET is your friend.  Not sure if NR and ATT
> settings translate to Line Out audio levels... but maybe.

Good catch, Scott.

Indeed, I did not have the ATT engaged on the Sub receiver!  However,
even though it makes less noisy on the low bands, the audio levels still
vary by about 6 dB when both are switched into a dummy load.

It seems as though when playing with AGC THR that the lowest value of
002 results in the levels being closer with live signals off the air.
As that value is raised the Sub receiver (right channel in Audacity)
raises level considerably faster.

73, Nate N0NB

--

"The optimist proclaims that we live in the best of all
possible worlds.  The pessimist fears this is true."

Web: http://www.n0nb.us  GPG key: D55A8819  GitHub: N0NB
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