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
Yuma, AZ
.
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