[Elecraft] My radio all of a sudden is so loud it blew a speaker!

[Barry]

Tom,
     I can't explain the cause of what's happening. Rob and I ran into 
some craziness last weekend with power out and the antenna tuner. We 
fixed the symptom, but have been unable to trace the cause. In my case, 
I'm willing to swear that RF got in and corrupted the matrix of L and C 
values stored in the radio's memory, but I can't reproduce the symptom. 
What Rob suggested was to store off the radio settings using the 
utility, doing a reset, and put the setting back. That seems to have 
fixed the problem, so far. What is crazy is that of the set of K3 owners 
around us, only Rob and I seem to have had a problem. In the about 2 
years I've used my K3s, there has never been a hint of anything like 
this.

73,
Barry
K3NDM

------ Original Message ------
From: "tomb18" <tomb18 at videotron.ca>
To: "Barry" <k3ndm at comcast.net>; "Elecraft" <elecraft at mailman.qth.net>
Sent: 1/27/2018 7:24:54 PM
Subject: Re: Re[2]: [Elecraft] My radio all of a sudden is so loud it 
blew a speaker!

>Hi
>Yes but it's weird that never arose in the past.
>The one thing that IS different this time is that the radio had a full 
>power down. Not just the front panel....
>73 Tom
>
>
>
>Sent from my Samsung Galaxy smartphone.
>
>-------- Original message --------
>From: Barry <k3ndm at comcast.net>
>Date: 2018-01-27 7:12 PM (GMT-05:00)
>To: Tom <tomb18 at videotron.ca>, Elecraft <elecraft at mailman.qth.net>
>Subject: Re[2]: [Elecraft] My radio all of a sudden is so loud it blew 
>a speaker!
>
>Tom,
>      Something comes to mind. Go into the setup menu and check the AGC
>threshold. As you move it up in number, the audio output goes up, and 
>it
>takes a greater signal amplitude before it "kicks" in. I usually use
>this when using data A to prevent AGC capture, or at least as much, by
>other signals in the passband, for instance FT8 with a received
>bandwidth of 2.5KHz. Normally, the K3 AGC is excellent and should have
>prevented what you describe unless the the AGC threshold is too high.
>
>73,
>Barry
>K3NDM
>
>------ Original Message ------
>From: "Tom" <tomb18 at videotron.ca>
>To: "Elecraft" <elecraft at mailman.qth.net>
>Sent: 1/27/2018 6:24:40 PM
>Subject: Re: [Elecraft] My radio all of a sudden is so loud it blew a
>speaker!
>
> >Hi,
> >No the AGC is On.  It's still overall several times higher than I have
> >ever heard when in High.
> >That's very strange since I always had it at high and when I first
> >checked it was at High.
> >So now if I put it to low is is as it has always been. Putting it at
> >high with AGC off, I will now blow any speaker attached!
> >Tom
> >
> >
> >-----Original Message----- From: Dave Hachadorian
> >Sent: Saturday, January 27, 2018 5:43 PM
> >To: Tom
> >Subject: Re: [Elecraft] My radio all of a sudden is so loud it blew a
> >speaker!
> >
> >Did AGC get turned off?
> >
> >-----Original Message----- From: Tom
> >Sent: Saturday, January 27, 2018 3:13 PM
> >To: Elecraft
> >Subject: [Elecraft] My radio all of a sudden is so loud it blew a
> >speaker!
> >
> >HI,
> >Ok a strange thing happened today.  I was moving my K3 from one
> >rack to another and once everything was connected up I turned it
> >on. Now I use an external speaker and the volume was so loud that
> >it blew.  I immediately turned down the volume and went to the
> >speaker in the K3.  Barely touching the volume control resulted
> >in such a high volume level that I was afraid the speaker would
> >blow there too!.
> >I checked the menu setting for the AF Gain and it was set to high
> >which I have always used since I found the audio out of the K3
> >was too low for me.
> >Now, I’ve had to put it at low and it seems that it is now back
> >to the way it was.
> >So is it really that loud on High and why would I have not seen
> >this before?
> >Thanks, Tom
> >va2fsq.com
> >
> >---
> >This email has been checked for viruses by Avast antivirus
> >software.
> >https://www.avast.com/antivirus
> >______________________________________________________________
> >Elecraft mailing list
> >Home: http://mailman.qth.net/mailman/listinfo/elecraft
> >Help: http://mailman.qth.net/mmfaq.htm
> >Post: mailto:Elecraft at mailman.qth.net
> >
> >This list hosted by: http://www.qsl.net
> >Please help support this email list:
> >http://www.qsl.net/donate.html
> >Message delivered to k6ll.dave at gmail.com
> >
> >---
> >This email has been checked for viruses by Avast antivirus software.
> >https://www.avast.com/antivirus
> >
> >______________________________________________________________
> >Elecraft mailing list
> >Home: http://mailman.qth.net/mailman/listinfo/elecraft
> >Help: http://mailman.qth.net/mmfaq.htm
> >Post: mailto:Elecraft at mailman.qth.net
> >
> >This list hosted by: http://www.qsl.net
> >Please help support this email list: http://www.qsl.net/donate.html
> >Message delivered to k3ndm at comcast.net
>