[Elecraft] Loss of speaker audio K3

[Andrew Catanzaro]

Keith,

My K3 lost it's audio in the same fashion yesterday as I powered it up for Field Day yesterday.  There was a repetitive crackle as the speaker audio died.  The audio come back later, but the crackle was 20 dB louder than the signals of interest.  The headphone audio was unaffected.  I reloaded my last good configuration and all the latest firmware, hoping against hope, and of course that did not help.  Looks like a harware problem in the speaker amp circuitry.  

I did do the mod to protect the output chip and I never plug anything into the speaker jack when the radio is on.  So as far as I can tell, this just happened spontaneously.

I'll be interested to hear what Gary has to say at K3support.

73,

Andy



Message: 17
Date: Sun, 28 Jun 2009 12:04:45 +0800
From: Keith Bainbridge <vk6xh at arach.net.au>
Subject: [Elecraft] Loss of speaker audio K3
To: elecraft at mailman.qth.net
Message-ID: <4A46EBDD.30601 at arach.net.au>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

I've had a report today that one of the clubs K3's has lost all audio 
from the internal speaker and the rear speaker jack, it just crackled 
and disappeared. The headphones are still working fine.
All menu settings are correct, but no audio.
As I'm not there at present I'm unable to do any other checks but the 
guys using the radio are fully conversant with the menu settings.
Any ideas guys ?
I will pay the club a visit on tuesday to check it out but wondered if 
anyone else had come across this before.
73
Keith
-- 
Keith
R K Bainbridge
VK6RK/ VK6XH
http://vk6rk.blogspot.com
Northern Corridor Radio Group Inc VK6NC /VK6ANC