I use a small electret mike form an old computer. Mic gain of 6 causes ALC activity just below full scale. Reports indicated that COMP to the max (30) produced punchy and undistorted signal. When listening on K3, varying mic gain from 4 to 10 caused very little difference in speech quality.
IM in KX3 strongly depends on the combination of power and voltage. See a document in file section on yahoo KX3 site. Too much power at low voltage can cause IMD of -20db. The effect of mic gain and compression on IMD is much lower than that of voltage. Confirmed on P3. KX3 seems to be very sensitive to low voltage as far as efficiency is concerned. For example, at 12V the radio draws 2.2A and produces 10W. About 38% efficiency and 16W dissipation. At 8V (NiMH under load), the radio produces 2.5W and draws 1.8A, for 17% efficiency and 12 W dissipation. Voltage and amp readings from KX3. Setting power to 5W at 12V, the radio draws 1.1A, for 38% efficiency and 8 W dissipation. Not all of it is bad as many other radios stop working < 11V. Ignacy, NO9E -- View this message in context: http://elecraft.365791.n2.nabble.com/KX3-MIC-COMP-Setting-Metering-tp7562532p7562597.html Sent from the Elecraft mailing list archive at Nabble.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
