K3 sudden high volume behaviour

[Stephen Prior]

I've been on 80m ssb tonight running 100W both with vox and without.

On two occasions I have gone to receive and been totally deafened in the
headphones, requiring me to turn the af gain down quickly.  The volume level
was as if it were set to maximum.  Restoring the af gain control to the
usual setting restores the correct volume.

I've looked through my archives but recognised any mention of the problem.

The K3 is serial number 980 and has the latest firmware.

Any ideas please?  I have AGC SLP at 12, but I would not have thought that
to be the problem.

Thanks

Stephen G4SJP



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[Stephen Prior]

I have just realised that I had MacLoggerDX running on my Mac during the qso
where I had the problem and wondering if the volume control slider on that
were somehow misbehaving with rf into the serial connection.  80m knocks out
my broadband connection, so there is a possible emc issue there.  If anyone
can come up with another similar experience that would be useful.

For the moment it's not a show stopper!

73 Stephen G4SJP


On 01/06/2008 21:24, "Stephen  Prior" <[hidden email]> wrote:

> I've been on 80m ssb tonight running 100W both with vox and without.
>
> On two occasions I have gone to receive and been totally deafened in the
> headphones, requiring me to turn the af gain down quickly.  The volume level
> was as if it were set to maximum.  Restoring the af gain control to the
> usual setting restores the correct volume.
>
> I've looked through my archives but recognised any mention of the problem.
>
> The K3 is serial number 980 and has the latest firmware.
>
> Any ideas please?  I have AGC SLP at 12, but I would not have thought that
> to be the problem.
>
> Thanks
>
> Stephen G4SJP
>
>
>
> _______________________________________________
> Elecraft mailing list
> Post to: [hidden email]
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
>  http://mailman.qth.net/mailman/listinfo/elecraft
>
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> Elecraft web page: http://www.elecraft.com
>

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[N5GE]

On Sun, 01 Jun 2008 21:24:33 +0100, Stephen Prior <[hidden email]>
wrote:

>I've been on 80m ssb tonight running 100W both with vox and without.
>
>On two occasions I have gone to receive and been totally deafened in the
>headphones, requiring me to turn the af gain down quickly.  The volume level
>was as if it were set to maximum.  Restoring the af gain control to the
>usual setting restores the correct volume.
>
>I've looked through my archives but recognised any mention of the problem.
>
>The K3 is serial number 980 and has the latest firmware.
>
>Any ideas please?  I have AGC SLP at 12, but I would not have thought that
>to be the problem.
>
>Thanks
>
>Stephen G4SJP

[snip]

It's in the manual.

Look at page 50 in the manual (Config Menu) and in the ENTRY column find AGC SLP
(AGC Slope) and adjust it to a higher value than 10.  This setting adjusts how
much louder you want strong signals to be over weak signals.

In my experience a setting of around 12 is what I prefer.  I like for signal to
sound loader if they are stronger, but as you say, the default can make your
hair stand up on a 30 over 9 signal ;O)

Tom, N5GE - SWOT 3537 - Grid EM12jq

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Safety deserve neither
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Assembly to the Governor
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just the parts you like.

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