[Elecraft] K3 speaker amp chip bites the dust again - CORRECTION!

[Mike K2MK]

Hi Dave,

I'm glad you found a solution and it's good to know that the mods work. You
might want to take this opportunity to reevaluate your AGC settings. I use
headphones and anything above 010 is painful. I used to set it to 012 to
help my brain work weak signals but the occasional strong signal felt like
Q-tips piecing my ear drums. Ramping the AGC THR up to 020 is unthinkable
for me.

73,
Mike K2MK


Dave Hachadorian-2 wrote
> My posting this morning about blowing the speaker amp chip was in 
> error.  Further investigation reveals that I actually blew out 
> the K3's internal speaker.  Ohmmeter measurement at the speaker 
> terminals shows that the coil is wide open.  This is really good 
> news, because the speaker is easily replaceable in the field.
> 
> It's also good news because it points out the efficacy of the 
> E85056 protection mod.
> 
> My apologies for making a wrong assumption.  The symptoms were 
> exactly the same as the two previous failures of the speaker amp.
> 
> Dave Hachadorian, K6LL





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