Joe Subich, W4TV wrote: > I would not use any speaker less than 8 Ohms with the K3.
Hi Joe, I've used 4-ohm speakers with the K3 for over two years and have yet to hear any distortion at moderate speaker volume. As long as the RFC47 modification has been made on the RF board, the AF amp chip can easily source the peak current needed for 4-ohm loads. It's true that in any AF amp, distortion increases as load Z goes down, but this is a floor effect compared to other factors usually present (atmospheric and pulse noise, AGC dynamics, transmitter IMD, etc.). The only problem we've had is with mono speaker plugs in conjunction with a setting of SPKRS=2, which can result in excessive AF amp current. But this situation is detected and corrected in the latest field-test firmware revision. I'll be releasing it to beta shortly. 73, Wayne N6KR --- http://www.elecraft.com ______________________________________________________________ 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
