[Elecraft] No speaker audio

[Geoffrey Mackenzie-Kennedy]

Kirk,

Sounds as though the internal switch in your headphone jack has failed, and 
the only practical fix I believe is to replace it.  Since 2003 the switch in 
the original headphone jack and its replacement in my K2 have failed, and I 
now use a robust headphone jack mounted on the rear panel.

73,
Geoff
GM4ESD

----- Original Message ----- 
From: "Kirk Brown" <kbpayh at gmail.com>
To: <elecraft at mailman.qth.net>
Sent: Saturday, January 13, 2007 12:17 AM
Subject: [Elecraft] No speaker audio


>I recently discovered that my external speaker fails to work after
> pulling out my headphones. I checked the resistance of the speaker and
> it reads 8 ohms, and the DC voltage across the plug (P5) is almost
> nothing. The DC voltage out of the audio amp U9 (Pin #6) reads 13
> volts. R35/36 should be ok because the headphones work fine.
>
> I think J2 is the problem and could be called a TIF (toddler induced
> failure). My son was sitting on my lap listening to "beeping" and he
> tugged on the headphone cord. Could this have damaged the  internal
> switch, keeping it stuck in headphone mode? Is there any way to fix
> this?
>
> 73,
>
> Kirk (KA2P)