[Elecraft] K3 Speaker Amp Protection

[Joe Subich, W4TV]

Barry,

I can see "Mod Rev C" protecting against speaker ringing or the sudden
removal of a low impedance load by damping the inductive kick but it
certainly does not protect against sustained high levels into a very
low impedance (or short circuit) load.  470 Ohm resistors in parallel
with a short circuit or paralleled 4 Ohm speakers are not going to do
anything to change the behavior of the circuit.

73,

    ... Joe, W4TV


On 3/12/2013 8:21 PM, F. Barry McWilliams wrote:
> Joe, you may be right, but the description of the Revision C mod says, "This modification protects the K3's audio amplifier if either speaker output is connected to a short circuit or very low impedance load."
>
> Since I've made this mod, I'd like (hope) to know that this protects the audio amp.
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