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. ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
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