[Elecraft] K3 speaker amp chip bites the dust again

[Fred Townsend]

It sounds like there may be another fault in your system. Are you hooking up to any powered external speakers or phones?
73, Fred, AE6QL

-----Original Message-----
>From: Dave Hachadorian <k6ll.dave at gmail.com>
>Sent: Jul 1, 2014 12:28 PM
>To: Reflector Elecraft <elecraft at mailman.qth.net>
>Subject: [Elecraft] K3 speaker amp chip bites the dust again
>
>I guess I've blown the speaker amp IC in my K3 again.  This is 
>the third time this has happened, twice in one radio and once in 
>another.
>
>In this case, the radio had both the AF Output Mod Kit (pair of 
>470 ohm resistors) and the E85056 Audio Protection Assembly 
>Circuit Board installed.
>
>I was operating on Field Day, with headphones, as I usually do, 
>when some onlookers wanted to hear what was going on.  I flipped 
>SPKRS+PHONES=YES, then along came a strong signal, and poof! no 
>speaker audio.
>
>AGC SLP was zero, and AGC THR was 020.  Front panel AGC was FAST.
>
>This failure is really getting old, especially at $120 a pop to 
>get it fixed.
>
>Dave Hachadorian, K6LL
>Big Bear Lake, CA
>
>